diff --git a/src/main/java/org/qortal/data/group/GroupData.java b/src/main/java/org/qortal/data/group/GroupData.java
index f25f1ce3..c97f5438 100644
--- a/src/main/java/org/qortal/data/group/GroupData.java
+++ b/src/main/java/org/qortal/data/group/GroupData.java
@@ -35,6 +35,11 @@ public class GroupData {
 	@Schema(hidden = true)
 	private int creationGroupId;
 
+	// For internal use
+	@XmlTransient
+	@Schema(hidden = true)
+	private String reducedGroupName;
+
 	// We abuse GroupData for API purposes by adding this unrelated field. Not always present.
 	private Boolean isAdmin;
 
@@ -45,10 +50,12 @@ public class GroupData {
 	}
 
 	/** Constructs new GroupData with nullable groupId and nullable updated [timestamp] */
-	public GroupData(Integer groupId, String owner, String name, String description, long created, Long updated, boolean isOpen, ApprovalThreshold approvalThreshold, int minBlockDelay, int maxBlockDelay, byte[] reference, int creationGroupId) {
+	public GroupData(Integer groupId, String owner, String groupName, String description, long created, Long updated,
+			boolean isOpen, ApprovalThreshold approvalThreshold, int minBlockDelay, int maxBlockDelay, byte[] reference,
+			int creationGroupId, String reducedGroupName) {
 		this.groupId = groupId;
 		this.owner = owner;
-		this.groupName = name;
+		this.groupName = groupName;
 		this.description = description;
 		this.created = created;
 		this.updated = updated;
@@ -58,11 +65,15 @@ public class GroupData {
 		this.minimumBlockDelay = minBlockDelay;
 		this.maximumBlockDelay = maxBlockDelay;
 		this.creationGroupId = creationGroupId;
+		this.reducedGroupName = reducedGroupName;
 	}
 
 	/** Constructs new GroupData with unassigned groupId */
-	public GroupData(String owner, String name, String description, long created, boolean isOpen, ApprovalThreshold approvalThreshold, int minBlockDelay, int maxBlockDelay, byte[] reference, int creationGroupId) {
-		this(null, owner, name, description, created, null, isOpen, approvalThreshold, minBlockDelay, maxBlockDelay, reference, creationGroupId);
+	public GroupData(String owner, String groupName, String description, long created, boolean isOpen,
+			ApprovalThreshold approvalThreshold, int minBlockDelay, int maxBlockDelay, byte[] reference,
+			int creationGroupId, String reducedGroupName) {
+		this(null, owner, groupName, description, created, null, isOpen, approvalThreshold, minBlockDelay,
+				maxBlockDelay, reference, creationGroupId, reducedGroupName);
 	}
 
 	// Getters / setters
@@ -115,7 +126,7 @@ public class GroupData {
 		this.reference = reference;
 	}
 
-	public boolean getIsOpen() {
+	public boolean isOpen() {
 		return this.isOpen;
 	}
 
@@ -143,6 +154,14 @@ public class GroupData {
 		return this.creationGroupId;
 	}
 
+	public String getReducedGroupName() {
+		return this.reducedGroupName;
+	}
+
+	public void setReducedGroupName(String reducedGroupName) {
+		this.reducedGroupName = reducedGroupName;
+	}
+
 	// This is for API call GET /groups/member/{address}
 
 	public Boolean isAdmin() {
diff --git a/src/main/java/org/qortal/data/transaction/CreateGroupTransactionData.java b/src/main/java/org/qortal/data/transaction/CreateGroupTransactionData.java
index 0ef6383b..4bcaa497 100644
--- a/src/main/java/org/qortal/data/transaction/CreateGroupTransactionData.java
+++ b/src/main/java/org/qortal/data/transaction/CreateGroupTransactionData.java
@@ -1,10 +1,14 @@
 package org.qortal.data.transaction;
 
+import javax.xml.bind.Unmarshaller;
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlElement;
+import javax.xml.bind.annotation.XmlTransient;
 
 import org.eclipse.persistence.oxm.annotations.XmlDiscriminatorValue;
+import org.qortal.block.GenesisBlock;
+import org.qortal.group.Group;
 import org.qortal.group.Group.ApprovalThreshold;
 import org.qortal.transaction.Transaction.TransactionType;
 
@@ -24,40 +28,32 @@ public class CreateGroupTransactionData extends TransactionData {
 
 	// Properties
 	// groupId can be null but assigned during save() or during load from repository
-	@Schema(
-		accessMode = AccessMode.READ_ONLY,
-		description = "assigned group ID"
-	)
+	@Schema(accessMode = AccessMode.READ_ONLY, description = "assigned group ID")
 	private Integer groupId = null;
-	@Schema(
-		description = "group owner's address",
-		example = "QgV4s3xnzLhVBEJxcYui4u4q11yhUHsd9v"
-	)
-	private String owner;
-	@Schema(
-		description = "group name",
-		example = "miner-group"
-	)
+
+	@Schema(description = "group name", example = "miner-group")
 	private String groupName;
-	@Schema(
-		description = "short description of group",
-		example = "this group is for block miners"
-	)
+
+	@Schema(description = "short description of group", example = "this group is for block miners")
 	private String description;
-	@Schema(
-		description = "whether anyone can join group (open) or group is invite-only (closed)",
-		example = "true"
-	)
+
+	@Schema(description = "whether anyone can join group (open) or group is invite-only (closed)", example = "true")
 	private boolean isOpen;
-	@Schema(
-		description = "how many group admins are required to approve group member transactions"
-	)
+
+	@Schema(description = "how many group admins are required to approve group member transactions")
 	private ApprovalThreshold approvalThreshold;
+
 	@Schema(description = "minimum block delay before approval takes effect")
 	private int minimumBlockDelay;
+
 	@Schema(description = "maximum block delay before which transaction approval must be reached")
 	private int maximumBlockDelay;
 
+	// For internal use
+	@XmlTransient
+	@Schema(hidden = true)
+	private String reducedGroupName;
+
 	// Constructors
 
 	// For JAXB
@@ -65,13 +61,22 @@ public class CreateGroupTransactionData extends TransactionData {
 		super(TransactionType.CREATE_GROUP);
 	}
 
+	public void afterUnmarshal(Unmarshaller u, Object parent) {
+		/*
+		 *  If we're being constructed as part of the genesis block info inside blockchain config
+		 *  then we need to construct 'reduced' group name.
+		 */
+		if (parent instanceof GenesisBlock.GenesisInfo && this.reducedGroupName == null)
+			this.reducedGroupName = Group.reduceName(this.groupName);
+	}
+
 	/** From repository */
 	public CreateGroupTransactionData(BaseTransactionData baseTransactionData,
-			String owner, String groupName, String description, boolean isOpen,
-			ApprovalThreshold approvalThreshold, int minimumBlockDelay, int maximumBlockDelay, Integer groupId) {
+			String groupName, String description, boolean isOpen,
+			ApprovalThreshold approvalThreshold, int minimumBlockDelay, int maximumBlockDelay,
+			Integer groupId, String reducedGroupName) {
 		super(TransactionType.CREATE_GROUP, baseTransactionData);
 
-		this.owner = owner;
 		this.groupName = groupName;
 		this.description = description;
 		this.isOpen = isOpen;
@@ -79,21 +84,18 @@ public class CreateGroupTransactionData extends TransactionData {
 		this.minimumBlockDelay = minimumBlockDelay;
 		this.maximumBlockDelay = maximumBlockDelay;
 		this.groupId = groupId;
+		this.reducedGroupName = reducedGroupName;
 	}
 
 	/** From network/API */
 	public CreateGroupTransactionData(BaseTransactionData baseTransactionData,
-			String owner, String groupName, String description, boolean isOpen,
+			String groupName, String description, boolean isOpen,
 			ApprovalThreshold approvalThreshold, int minimumBlockDelay, int maximumBlockDelay) {
-		this(baseTransactionData, owner, groupName, description, isOpen, approvalThreshold, minimumBlockDelay, maximumBlockDelay, null);
+		this(baseTransactionData, groupName, description, isOpen, approvalThreshold, minimumBlockDelay, maximumBlockDelay, null, null);
 	}
 
 	// Getters / setters
 
-	public String getOwner() {
-		return this.owner;
-	}
-
 	public String getGroupName() {
 		return this.groupName;
 	}
@@ -102,7 +104,7 @@ public class CreateGroupTransactionData extends TransactionData {
 		return this.description;
 	}
 
-	public boolean getIsOpen() {
+	public boolean isOpen() {
 		return this.isOpen;
 	}
 
@@ -126,27 +128,23 @@ public class CreateGroupTransactionData extends TransactionData {
 		this.groupId = groupId;
 	}
 
+	public String getReducedGroupName() {
+		return this.reducedGroupName;
+	}
+
+	public void setReducedGroupName(String reducedGroupName) {
+		this.reducedGroupName = reducedGroupName;
+	}
+
 	// Re-expose creatorPublicKey for this transaction type for JAXB
-	@XmlElement(
-		name = "creatorPublicKey"
-	)
-	@Schema(
-		name = "creatorPublicKey",
-		description = "group creator's public key",
-		example = "2tiMr5LTpaWCgbRvkPK8TFd7k63DyHJMMFFsz9uBf1ZP"
-	)
+	@XmlElement(name = "creatorPublicKey")
+	@Schema(name = "creatorPublicKey", description = "group creator's public key", example = "2tiMr5LTpaWCgbRvkPK8TFd7k63DyHJMMFFsz9uBf1ZP")
 	public byte[] getGroupCreatorPublicKey() {
 		return this.creatorPublicKey;
 	}
 
-	@XmlElement(
-		name = "creatorPublicKey"
-	)
-	@Schema(
-		name = "creatorPublicKey",
-		description = "group creator's public key",
-		example = "2tiMr5LTpaWCgbRvkPK8TFd7k63DyHJMMFFsz9uBf1ZP"
-	)
+	@XmlElement(name = "creatorPublicKey")
+	@Schema(name = "creatorPublicKey", description = "group creator's public key", example = "2tiMr5LTpaWCgbRvkPK8TFd7k63DyHJMMFFsz9uBf1ZP")
 	public void setGroupCreatorPublicKey(byte[] creatorPublicKey) {
 		this.creatorPublicKey = creatorPublicKey;
 	}
diff --git a/src/main/java/org/qortal/group/Group.java b/src/main/java/org/qortal/group/Group.java
index f00be199..a3cc017c 100644
--- a/src/main/java/org/qortal/group/Group.java
+++ b/src/main/java/org/qortal/group/Group.java
@@ -8,6 +8,7 @@ import java.util.Map;
 
 import org.qortal.account.Account;
 import org.qortal.account.PublicKeyAccount;
+import org.qortal.crypto.Crypto;
 import org.qortal.data.group.GroupAdminData;
 import org.qortal.data.group.GroupBanData;
 import org.qortal.data.group.GroupData;
@@ -29,6 +30,7 @@ import org.qortal.data.transaction.UpdateGroupTransactionData;
 import org.qortal.repository.DataException;
 import org.qortal.repository.GroupRepository;
 import org.qortal.repository.Repository;
+import org.qortal.utils.Unicode;
 
 public class Group {
 
@@ -78,6 +80,7 @@ public class Group {
 	// Useful constants
 	public static final int NO_GROUP = 0;
 
+	public static final int MIN_NAME_SIZE = 3;
 	public static final int MAX_NAME_SIZE = 32;
 	public static final int MAX_DESCRIPTION_SIZE = 128;
 	/** Max size of kick/ban reason */
@@ -95,10 +98,14 @@ public class Group {
 		this.repository = repository;
 		this.groupRepository = repository.getGroupRepository();
 
-		this.groupData = new GroupData(createGroupTransactionData.getOwner(), createGroupTransactionData.getGroupName(),
-				createGroupTransactionData.getDescription(), createGroupTransactionData.getTimestamp(), createGroupTransactionData.getIsOpen(),
-				createGroupTransactionData.getApprovalThreshold(), createGroupTransactionData.getMinimumBlockDelay(),
-				createGroupTransactionData.getMaximumBlockDelay(), createGroupTransactionData.getSignature(), createGroupTransactionData.getTxGroupId());
+		String owner = Crypto.toAddress(createGroupTransactionData.getCreatorPublicKey());
+
+		this.groupData = new GroupData(owner, createGroupTransactionData.getGroupName(),
+				createGroupTransactionData.getDescription(), createGroupTransactionData.getTimestamp(),
+				createGroupTransactionData.isOpen(), createGroupTransactionData.getApprovalThreshold(),
+				createGroupTransactionData.getMinimumBlockDelay(), createGroupTransactionData.getMaximumBlockDelay(),
+				createGroupTransactionData.getSignature(), createGroupTransactionData.getTxGroupId(),
+				createGroupTransactionData.getReducedGroupName());
 	}
 
 	/**
@@ -123,6 +130,10 @@ public class Group {
 
 	// Shortcuts to aid code clarity
 
+	public static String reduceName(String name) {
+		return Unicode.sanitize(name);
+	}
+
 	// Membership
 
 	private GroupMemberData getMember(String member) throws DataException {
@@ -355,16 +366,20 @@ public class Group {
 			throw new DataException("Unable to revert group transaction as referenced transaction not found in repository");
 
 		switch (previousTransactionData.getType()) {
-			case CREATE_GROUP:
+			case CREATE_GROUP: {
 				CreateGroupTransactionData previousCreateGroupTransactionData = (CreateGroupTransactionData) previousTransactionData;
-				this.groupData.setOwner(previousCreateGroupTransactionData.getOwner());
+
+				String owner = Crypto.toAddress(previousCreateGroupTransactionData.getCreatorPublicKey());
+
+				this.groupData.setOwner(owner);
 				this.groupData.setDescription(previousCreateGroupTransactionData.getDescription());
-				this.groupData.setIsOpen(previousCreateGroupTransactionData.getIsOpen());
+				this.groupData.setIsOpen(previousCreateGroupTransactionData.isOpen());
 				this.groupData.setApprovalThreshold(previousCreateGroupTransactionData.getApprovalThreshold());
 				this.groupData.setUpdated(null);
 				break;
+			}
 
-			case UPDATE_GROUP:
+			case UPDATE_GROUP: {
 				UpdateGroupTransactionData previousUpdateGroupTransactionData = (UpdateGroupTransactionData) previousTransactionData;
 				this.groupData.setOwner(previousUpdateGroupTransactionData.getNewOwner());
 				this.groupData.setDescription(previousUpdateGroupTransactionData.getNewDescription());
@@ -372,6 +387,7 @@ public class Group {
 				this.groupData.setApprovalThreshold(previousUpdateGroupTransactionData.getNewApprovalThreshold());
 				this.groupData.setUpdated(previousUpdateGroupTransactionData.getTimestamp());
 				break;
+			}
 
 			default:
 				throw new IllegalStateException("Unable to revert group transaction due to unsupported referenced transaction");
@@ -722,7 +738,7 @@ public class Group {
 
 		// If there is no invites and this group is "closed" (i.e. invite-only) then
 		// this is now a pending "join request"
-		if (groupInviteData == null && !groupData.getIsOpen()) {
+		if (groupInviteData == null && !groupData.isOpen()) {
 			// Save join request
 			this.addJoinRequest(joiner.getAddress(), joinGroupTransactionData.getSignature());
 
@@ -761,7 +777,7 @@ public class Group {
 		byte[] inviteReference = joinGroupTransactionData.getInviteReference();
 
 		// Was this a join-request only?
-		if (inviteReference == null && !groupData.getIsOpen()) {
+		if (inviteReference == null && !groupData.isOpen()) {
 			// Delete join request
 			this.deleteJoinRequest(joiner.getAddress());
 		} else {
diff --git a/src/main/java/org/qortal/repository/GroupRepository.java b/src/main/java/org/qortal/repository/GroupRepository.java
index 26074b74..bcee7d25 100644
--- a/src/main/java/org/qortal/repository/GroupRepository.java
+++ b/src/main/java/org/qortal/repository/GroupRepository.java
@@ -21,6 +21,8 @@ public interface GroupRepository {
 
 	public boolean groupExists(String groupName) throws DataException;
 
+	public boolean reducedGroupNameExists(String reducedGroupName) throws DataException;
+
 	public List<GroupData> getAllGroups(Integer limit, Integer offset, Boolean reverse) throws DataException;
 
 	public default List<GroupData> getAllGroups() throws DataException {
diff --git a/src/main/java/org/qortal/repository/hsqldb/HSQLDBDatabaseUpdates.java b/src/main/java/org/qortal/repository/hsqldb/HSQLDBDatabaseUpdates.java
index 12874e63..8cfa8f06 100644
--- a/src/main/java/org/qortal/repository/hsqldb/HSQLDBDatabaseUpdates.java
+++ b/src/main/java/org/qortal/repository/hsqldb/HSQLDBDatabaseUpdates.java
@@ -444,12 +444,15 @@ public class HSQLDBDatabaseUpdates {
 
 				case 12:
 					// Groups
-					stmt.execute("CREATE TABLE Groups (group_id GroupID, owner QortalAddress NOT NULL, group_name GroupName, "
+					stmt.execute("CREATE TABLE Groups (group_id GroupID, owner QortalAddress NOT NULL, group_name GroupName NOT NULL, "
 							+ "created_when EpochMillis NOT NULL, updated_when EpochMillis, is_open BOOLEAN NOT NULL, "
 							+ "approval_threshold TINYINT NOT NULL, min_block_delay INTEGER NOT NULL, max_block_delay INTEGER NOT NULL, "
-							+ "reference Signature, creation_group_id GroupID, description GenericDescription NOT NULL, PRIMARY KEY (group_id))");
-					// For when a user wants to lookup an group by name
+							+ "reference Signature, creation_group_id GroupID, reduced_group_name GroupName NOT NULL, "
+							+ "description GenericDescription NOT NULL, PRIMARY KEY (group_id))");
+					// For finding groups by name
 					stmt.execute("CREATE INDEX GroupNameIndex on Groups (group_name)");
+					// For finding groups by reduced name
+					stmt.execute("CREATE INDEX GroupReducedNameIndex on Groups (reduced_group_name)");
 					// For finding groups by owner
 					stmt.execute("CREATE INDEX GroupOwnerIndex ON Groups (owner)");
 
@@ -499,7 +502,7 @@ public class HSQLDBDatabaseUpdates {
 					// Group transactions
 					// Create group
 					stmt.execute("CREATE TABLE CreateGroupTransactions (signature Signature, creator QortalPublicKey NOT NULL, group_name GroupName NOT NULL, "
-							+ "owner QortalAddress NOT NULL, is_open BOOLEAN NOT NULL, approval_threshold TINYINT NOT NULL, "
+							+ "is_open BOOLEAN NOT NULL, approval_threshold TINYINT NOT NULL, reduced_group_name GroupName NOT NULL, "
 							+ "min_block_delay INTEGER NOT NULL, max_block_delay INTEGER NOT NULL, group_id GroupID, description GenericDescription NOT NULL, "
 							+ TRANSACTION_KEYS + ")");
 
diff --git a/src/main/java/org/qortal/repository/hsqldb/HSQLDBGroupRepository.java b/src/main/java/org/qortal/repository/hsqldb/HSQLDBGroupRepository.java
index 460b5641..60984ee0 100644
--- a/src/main/java/org/qortal/repository/hsqldb/HSQLDBGroupRepository.java
+++ b/src/main/java/org/qortal/repository/hsqldb/HSQLDBGroupRepository.java
@@ -28,7 +28,8 @@ public class HSQLDBGroupRepository implements GroupRepository {
 	@Override
 	public GroupData fromGroupId(int groupId) throws DataException {
 		String sql = "SELECT group_name, owner, description, created_when, updated_when, reference, is_open, "
-				+ "approval_threshold, min_block_delay, max_block_delay, creation_group_id FROM Groups WHERE group_id = ?";
+				+ "approval_threshold, min_block_delay, max_block_delay, creation_group_id, reduced_group_name "
+				+ "FROM Groups WHERE group_id = ?";
 
 		try (ResultSet resultSet = this.repository.checkedExecute(sql, groupId)) {
 			if (resultSet == null)
@@ -53,9 +54,10 @@ public class HSQLDBGroupRepository implements GroupRepository {
 			int maxBlockDelay = resultSet.getInt(10);
 
 			int creationGroupId = resultSet.getInt(11);
+			String reducedGroupName = resultSet.getString(12);
 
 			return new GroupData(groupId, owner, groupName, description, created, updated, isOpen,
-					approvalThreshold, minBlockDelay, maxBlockDelay, reference, creationGroupId);
+					approvalThreshold, minBlockDelay, maxBlockDelay, reference, creationGroupId, reducedGroupName);
 		} catch (SQLException e) {
 			throw new DataException("Unable to fetch group info from repository", e);
 		}
@@ -64,7 +66,8 @@ public class HSQLDBGroupRepository implements GroupRepository {
 	@Override
 	public GroupData fromGroupName(String groupName) throws DataException {
 		String sql = "SELECT group_id, owner, description, created_when, updated_when, reference, is_open, "
-				+ "approval_threshold, min_block_delay, max_block_delay, creation_group_id FROM Groups WHERE group_name = ?";
+				+ "approval_threshold, min_block_delay, max_block_delay, creation_group_id, reduced_group_name "
+				+ "FROM Groups WHERE group_name = ?";
 
 		try (ResultSet resultSet = this.repository.checkedExecute(sql, groupName)) {
 			if (resultSet == null)
@@ -89,9 +92,10 @@ public class HSQLDBGroupRepository implements GroupRepository {
 			int maxBlockDelay = resultSet.getInt(10);
 
 			int creationGroupId = resultSet.getInt(11);
+			String reducedGroupName = resultSet.getString(12);
 
 			return new GroupData(groupId, owner, groupName, description, created, updated, isOpen,
-					approvalThreshold, minBlockDelay, maxBlockDelay, reference, creationGroupId);
+					approvalThreshold, minBlockDelay, maxBlockDelay, reference, creationGroupId, reducedGroupName);
 		} catch (SQLException e) {
 			throw new DataException("Unable to fetch group info from repository", e);
 		}
@@ -115,12 +119,22 @@ public class HSQLDBGroupRepository implements GroupRepository {
 		}
 	}
 
+	@Override
+	public boolean reducedGroupNameExists(String reducedGroupName) throws DataException {
+		try {
+			return this.repository.exists("Groups", "reduced_group_name = ?", reducedGroupName);
+		} catch (SQLException e) {
+			throw new DataException("Unable to check for reduced group name in repository", e);
+		}
+	}
+
 	@Override
 	public List<GroupData> getAllGroups(Integer limit, Integer offset, Boolean reverse) throws DataException {
 		StringBuilder sql = new StringBuilder(512);
 
 		sql.append("SELECT group_id, owner, group_name, description, created_when, updated_when, reference, is_open, "
-				+ "approval_threshold, min_block_delay, max_block_delay, creation_group_id FROM Groups ORDER BY group_name");
+				+ "approval_threshold, min_block_delay, max_block_delay, creation_group_id, reduced_group_name "
+				+ "FROM Groups ORDER BY group_name");
 
 		if (reverse != null && reverse)
 			sql.append(" DESC");
@@ -154,9 +168,10 @@ public class HSQLDBGroupRepository implements GroupRepository {
 				int maxBlockDelay = resultSet.getInt(11);
 
 				int creationGroupId = resultSet.getInt(12);
+				String reducedGroupName = resultSet.getString(13);
 
 				groups.add(new GroupData(groupId, owner, groupName, description, created, updated, isOpen,
-						approvalThreshold, minBlockDelay, maxBlockDelay, reference, creationGroupId));
+						approvalThreshold, minBlockDelay, maxBlockDelay, reference, creationGroupId, reducedGroupName));
 			} while (resultSet.next());
 
 			return groups;
@@ -170,7 +185,8 @@ public class HSQLDBGroupRepository implements GroupRepository {
 		StringBuilder sql = new StringBuilder(512);
 
 		sql.append("SELECT group_id, group_name, description, created_when, updated_when, reference, is_open, "
-				+ "approval_threshold, min_block_delay, max_block_delay, creation_group_id FROM Groups WHERE owner = ? ORDER BY group_name");
+				+ "approval_threshold, min_block_delay, max_block_delay, creation_group_id, reduced_group_name "
+				+ "FROM Groups WHERE owner = ? ORDER BY group_name");
 
 		if (reverse != null && reverse)
 			sql.append(" DESC");
@@ -203,9 +219,10 @@ public class HSQLDBGroupRepository implements GroupRepository {
 				int maxBlockDelay = resultSet.getInt(10);
 
 				int creationGroupId = resultSet.getInt(11);
+				String reducedGroupName = resultSet.getString(12);
 
 				groups.add(new GroupData(groupId, owner, groupName, description, created, updated, isOpen,
-						approvalThreshold, minBlockDelay, maxBlockDelay, reference, creationGroupId));
+						approvalThreshold, minBlockDelay, maxBlockDelay, reference, creationGroupId, reducedGroupName));
 			} while (resultSet.next());
 
 			return groups;
@@ -219,7 +236,7 @@ public class HSQLDBGroupRepository implements GroupRepository {
 		StringBuilder sql = new StringBuilder(512);
 
 		sql.append("SELECT group_id, owner, group_name, description, created_when, updated_when, reference, is_open, "
-				+ "approval_threshold, min_block_delay, max_block_delay, creation_group_id, admin FROM Groups "
+				+ "approval_threshold, min_block_delay, max_block_delay, creation_group_id, reduced_group_name, admin FROM Groups "
 				+ "JOIN GroupMembers USING (group_id) "
 				+ "LEFT OUTER JOIN GroupAdmins ON GroupAdmins.group_id = GroupMembers.group_id AND GroupAdmins.admin = GroupMembers.address "
 				+ "WHERE address = ? ORDER BY group_name");
@@ -256,12 +273,13 @@ public class HSQLDBGroupRepository implements GroupRepository {
 				int maxBlockDelay = resultSet.getInt(11);
 
 				int creationGroupId = resultSet.getInt(12);
+				String reducedGroupName = resultSet.getString(13);
 
-				resultSet.getString(13); // 'admin'
+				resultSet.getString(14); // 'admin'
 				boolean isAdmin = !resultSet.wasNull();
 
 				GroupData groupData = new GroupData(groupId, owner, groupName, description, created, updated, isOpen,
-						approvalThreshold, minBlockDelay, maxBlockDelay, reference, creationGroupId);
+						approvalThreshold, minBlockDelay, maxBlockDelay, reference, creationGroupId, reducedGroupName);
 
 				groupData.setIsAdmin(isAdmin);
 
@@ -280,9 +298,9 @@ public class HSQLDBGroupRepository implements GroupRepository {
 
 		saveHelper.bind("group_id", groupData.getGroupId()).bind("owner", groupData.getOwner()).bind("group_name", groupData.getGroupName())
 				.bind("description", groupData.getDescription()).bind("created_when", groupData.getCreated()).bind("updated_when", groupData.getUpdated())
-				.bind("reference", groupData.getReference()).bind("is_open", groupData.getIsOpen()).bind("approval_threshold", groupData.getApprovalThreshold().value)
+				.bind("reference", groupData.getReference()).bind("is_open", groupData.isOpen()).bind("approval_threshold", groupData.getApprovalThreshold().value)
 				.bind("min_block_delay", groupData.getMinimumBlockDelay()).bind("max_block_delay", groupData.getMaximumBlockDelay())
-				.bind("creation_group_id", groupData.getCreationGroupId());
+				.bind("creation_group_id", groupData.getCreationGroupId()).bind("reduced_group_name", groupData.getReducedGroupName());
 
 		try {
 			saveHelper.execute(this.repository);
diff --git a/src/main/java/org/qortal/repository/hsqldb/transaction/HSQLDBCreateGroupTransactionRepository.java b/src/main/java/org/qortal/repository/hsqldb/transaction/HSQLDBCreateGroupTransactionRepository.java
index fb20c504..583b9fa6 100644
--- a/src/main/java/org/qortal/repository/hsqldb/transaction/HSQLDBCreateGroupTransactionRepository.java
+++ b/src/main/java/org/qortal/repository/hsqldb/transaction/HSQLDBCreateGroupTransactionRepository.java
@@ -18,28 +18,30 @@ public class HSQLDBCreateGroupTransactionRepository extends HSQLDBTransactionRep
 	}
 
 	TransactionData fromBase(BaseTransactionData baseTransactionData) throws DataException {
-		String sql = "SELECT owner, group_name, description, is_open, approval_threshold, min_block_delay, max_block_delay, group_id FROM CreateGroupTransactions WHERE signature = ?";
+		String sql = "SELECT group_name, description, is_open, approval_threshold, min_block_delay, max_block_delay, group_id, reduced_group_name "
+				+ "FROM CreateGroupTransactions WHERE signature = ?";
 
 		try (ResultSet resultSet = this.repository.checkedExecute(sql, baseTransactionData.getSignature())) {
 			if (resultSet == null)
 				return null;
 
-			String owner = resultSet.getString(1);
-			String groupName = resultSet.getString(2);
-			String description = resultSet.getString(3);
-			boolean isOpen = resultSet.getBoolean(4);
+			String groupName = resultSet.getString(1);
+			String description = resultSet.getString(2);
+			boolean isOpen = resultSet.getBoolean(3);
 
-			ApprovalThreshold approvalThreshold = ApprovalThreshold.valueOf(resultSet.getInt(5));
+			ApprovalThreshold approvalThreshold = ApprovalThreshold.valueOf(resultSet.getInt(4));
 
-			int minBlockDelay = resultSet.getInt(6);
-			int maxBlockDelay = resultSet.getInt(7);
+			int minBlockDelay = resultSet.getInt(5);
+			int maxBlockDelay = resultSet.getInt(6);
 
-			Integer groupId = resultSet.getInt(8);
+			Integer groupId = resultSet.getInt(7);
 			if (groupId == 0 && resultSet.wasNull())
 				groupId = null;
 
-			return new CreateGroupTransactionData(baseTransactionData, owner, groupName, description, isOpen, approvalThreshold,
-					minBlockDelay, maxBlockDelay, groupId);
+			String reducedGroupName = resultSet.getString(8);
+
+			return new CreateGroupTransactionData(baseTransactionData, groupName, description, isOpen, approvalThreshold,
+					minBlockDelay, maxBlockDelay, groupId, reducedGroupName);
 		} catch (SQLException e) {
 			throw new DataException("Unable to fetch create group transaction from repository", e);
 		}
@@ -52,8 +54,8 @@ public class HSQLDBCreateGroupTransactionRepository extends HSQLDBTransactionRep
 		HSQLDBSaver saveHelper = new HSQLDBSaver("CreateGroupTransactions");
 
 		saveHelper.bind("signature", createGroupTransactionData.getSignature()).bind("creator", createGroupTransactionData.getCreatorPublicKey())
-				.bind("owner", createGroupTransactionData.getOwner()).bind("group_name", createGroupTransactionData.getGroupName())
-				.bind("description", createGroupTransactionData.getDescription()).bind("is_open", createGroupTransactionData.getIsOpen())
+				.bind("group_name", createGroupTransactionData.getGroupName()).bind("reduced_group_name", createGroupTransactionData.getReducedGroupName())
+				.bind("description", createGroupTransactionData.getDescription()).bind("is_open", createGroupTransactionData.isOpen())
 				.bind("approval_threshold", createGroupTransactionData.getApprovalThreshold().value)
 				.bind("min_block_delay", createGroupTransactionData.getMinimumBlockDelay())
 				.bind("max_block_delay", createGroupTransactionData.getMaximumBlockDelay()).bind("group_id", createGroupTransactionData.getGroupId());
diff --git a/src/main/java/org/qortal/transaction/CreateGroupTransaction.java b/src/main/java/org/qortal/transaction/CreateGroupTransaction.java
index 0240bd90..17a0b052 100644
--- a/src/main/java/org/qortal/transaction/CreateGroupTransaction.java
+++ b/src/main/java/org/qortal/transaction/CreateGroupTransaction.java
@@ -5,12 +5,12 @@ import java.util.List;
 
 import org.qortal.account.Account;
 import org.qortal.asset.Asset;
-import org.qortal.crypto.Crypto;
 import org.qortal.data.transaction.CreateGroupTransactionData;
 import org.qortal.data.transaction.TransactionData;
 import org.qortal.group.Group;
 import org.qortal.repository.DataException;
 import org.qortal.repository.Repository;
+import org.qortal.utils.Unicode;
 
 import com.google.common.base.Utf8;
 
@@ -31,7 +31,7 @@ public class CreateGroupTransaction extends Transaction {
 
 	@Override
 	public List<String> getRecipientAddresses() throws DataException {
-		return Collections.singletonList(this.createGroupTransactionData.getOwner());
+		return Collections.emptyList();
 	}
 
 	// Navigation
@@ -40,14 +40,19 @@ public class CreateGroupTransaction extends Transaction {
 		return this.getCreator();
 	}
 
+	private synchronized String getReducedGroupName() {
+		if (this.createGroupTransactionData.getReducedGroupName() == null) {
+			String reducedGroupName = Group.reduceName(this.createGroupTransactionData.getGroupName());
+			this.createGroupTransactionData.setReducedGroupName(reducedGroupName);
+		}
+
+		return this.createGroupTransactionData.getReducedGroupName();
+	}
+
 	// Processing
 
 	@Override
 	public ValidationResult isValid() throws DataException {
-		// Check owner address is valid
-		if (!Crypto.isValidAddress(this.createGroupTransactionData.getOwner()))
-			return ValidationResult.INVALID_ADDRESS;
-
 		// Check approval threshold is valid
 		if (this.createGroupTransactionData.getApprovalThreshold() == null)
 			return ValidationResult.INVALID_GROUP_APPROVAL_THRESHOLD;
@@ -62,9 +67,11 @@ public class CreateGroupTransaction extends Transaction {
 		if (this.createGroupTransactionData.getMaximumBlockDelay() < this.createGroupTransactionData.getMinimumBlockDelay())
 			return ValidationResult.INVALID_GROUP_BLOCK_DELAY;
 
+		String groupName = this.createGroupTransactionData.getGroupName();
+
 		// Check group name size bounds
-		int groupNameLength = Utf8.encodedLength(this.createGroupTransactionData.getGroupName());
-		if (groupNameLength < 1 || groupNameLength > Group.MAX_NAME_SIZE)
+		int groupNameLength = Utf8.encodedLength(groupName);
+		if (groupNameLength < Group.MIN_NAME_SIZE || groupNameLength > Group.MAX_NAME_SIZE)
 			return ValidationResult.INVALID_NAME_LENGTH;
 
 		// Check description size bounds
@@ -72,8 +79,8 @@ public class CreateGroupTransaction extends Transaction {
 		if (descriptionLength < 1 || descriptionLength > Group.MAX_DESCRIPTION_SIZE)
 			return ValidationResult.INVALID_DESCRIPTION_LENGTH;
 
-		// Check group name is lowercase
-		if (!this.createGroupTransactionData.getGroupName().equals(this.createGroupTransactionData.getGroupName().toLowerCase()))
+		// Check name is in normalized form (no leading/trailing whitespace, etc.)
+		if (!groupName.equals(Unicode.normalize(groupName)))
 			return ValidationResult.NAME_NOT_LOWER_CASE;
 
 		Account creator = getCreator();
@@ -82,13 +89,16 @@ public class CreateGroupTransaction extends Transaction {
 		if (creator.getConfirmedBalance(Asset.QORT) < this.createGroupTransactionData.getFee())
 			return ValidationResult.NO_BALANCE;
 
+		// Fill in missing reduced name. Caller is likely to save this as next step.
+		getReducedGroupName();
+
 		return ValidationResult.OK;
 	}
 
 	@Override
 	public ValidationResult isProcessable() throws DataException {
 		// Check the group name isn't already taken
-		if (this.repository.getGroupRepository().groupExists(this.createGroupTransactionData.getGroupName()))
+		if (this.repository.getGroupRepository().reducedGroupNameExists(getReducedGroupName()))
 			return ValidationResult.GROUP_ALREADY_EXISTS;
 
 		return ValidationResult.OK;
diff --git a/src/main/java/org/qortal/transform/transaction/CreateGroupTransactionTransformer.java b/src/main/java/org/qortal/transform/transaction/CreateGroupTransactionTransformer.java
index 8a3d16f0..29afba9d 100644
--- a/src/main/java/org/qortal/transform/transaction/CreateGroupTransactionTransformer.java
+++ b/src/main/java/org/qortal/transform/transaction/CreateGroupTransactionTransformer.java
@@ -20,14 +20,13 @@ import com.google.common.primitives.Longs;
 public class CreateGroupTransactionTransformer extends TransactionTransformer {
 
 	// Property lengths
-	private static final int OWNER_LENGTH = ADDRESS_LENGTH;
 	private static final int NAME_SIZE_LENGTH = INT_LENGTH;
 	private static final int DESCRIPTION_SIZE_LENGTH = INT_LENGTH;
 	private static final int IS_OPEN_LENGTH = BOOLEAN_LENGTH;
 	private static final int APPROVAL_THRESHOLD_LENGTH = BYTE_LENGTH;
 	private static final int BLOCK_DELAY_LENGTH = INT_LENGTH;
 
-	private static final int EXTRAS_LENGTH = OWNER_LENGTH + NAME_SIZE_LENGTH + DESCRIPTION_SIZE_LENGTH + IS_OPEN_LENGTH
+	private static final int EXTRAS_LENGTH = NAME_SIZE_LENGTH + DESCRIPTION_SIZE_LENGTH + IS_OPEN_LENGTH
 			+ APPROVAL_THRESHOLD_LENGTH + BLOCK_DELAY_LENGTH + BLOCK_DELAY_LENGTH;
 
 	protected static final TransactionLayout layout;
@@ -39,7 +38,6 @@ public class CreateGroupTransactionTransformer extends TransactionTransformer {
 		layout.add("transaction's groupID", TransformationType.INT);
 		layout.add("reference", TransformationType.SIGNATURE);
 		layout.add("group creator's public key", TransformationType.PUBLIC_KEY);
-		layout.add("group owner's address", TransformationType.ADDRESS);
 		layout.add("group's name length", TransformationType.INT);
 		layout.add("group's name", TransformationType.STRING);
 		layout.add("group's description length", TransformationType.INT);
@@ -62,8 +60,6 @@ public class CreateGroupTransactionTransformer extends TransactionTransformer {
 
 		byte[] creatorPublicKey = Serialization.deserializePublicKey(byteBuffer);
 
-		String owner = Serialization.deserializeAddress(byteBuffer);
-
 		String groupName = Serialization.deserializeSizedString(byteBuffer, Group.MAX_NAME_SIZE);
 
 		String description = Serialization.deserializeSizedString(byteBuffer, Group.MAX_DESCRIPTION_SIZE);
@@ -83,7 +79,7 @@ public class CreateGroupTransactionTransformer extends TransactionTransformer {
 
 		BaseTransactionData baseTransactionData = new BaseTransactionData(timestamp, txGroupId, reference, creatorPublicKey, fee, signature);
 
-		return new CreateGroupTransactionData(baseTransactionData, owner, groupName, description, isOpen, approvalThreshold, minBlockDelay, maxBlockDelay);
+		return new CreateGroupTransactionData(baseTransactionData, groupName, description, isOpen, approvalThreshold, minBlockDelay, maxBlockDelay);
 	}
 
 	public static int getDataLength(TransactionData transactionData) throws TransformationException {
@@ -101,13 +97,11 @@ public class CreateGroupTransactionTransformer extends TransactionTransformer {
 
 			transformCommonBytes(transactionData, bytes);
 
-			Serialization.serializeAddress(bytes, createGroupTransactionData.getOwner());
-
 			Serialization.serializeSizedString(bytes, createGroupTransactionData.getGroupName());
 
 			Serialization.serializeSizedString(bytes, createGroupTransactionData.getDescription());
 
-			bytes.write((byte) (createGroupTransactionData.getIsOpen() ? 1 : 0));
+			bytes.write((byte) (createGroupTransactionData.isOpen() ? 1 : 0));
 
 			bytes.write((byte) createGroupTransactionData.getApprovalThreshold().value);
 
diff --git a/src/test/java/org/qortal/test/common/GroupUtils.java b/src/test/java/org/qortal/test/common/GroupUtils.java
index a026b605..19d229fd 100644
--- a/src/test/java/org/qortal/test/common/GroupUtils.java
+++ b/src/test/java/org/qortal/test/common/GroupUtils.java
@@ -27,7 +27,7 @@ public class GroupUtils {
 		String groupDescription = groupName + " (test group)";
 
 		BaseTransactionData baseTransactionData = new BaseTransactionData(timestamp, Group.NO_GROUP, reference, account.getPublicKey(), GroupUtils.fee, null);
-		TransactionData transactionData = new CreateGroupTransactionData(baseTransactionData, account.getAddress(), groupName, groupDescription, isOpen, approvalThreshold, minimumBlockDelay, maximumBlockDelay);
+		TransactionData transactionData = new CreateGroupTransactionData(baseTransactionData, groupName, groupDescription, isOpen, approvalThreshold, minimumBlockDelay, maximumBlockDelay);
 
 		TransactionUtils.signAndMint(repository, transactionData, account);
 
diff --git a/src/test/java/org/qortal/test/common/transaction/CreateGroupTestTransaction.java b/src/test/java/org/qortal/test/common/transaction/CreateGroupTestTransaction.java
index c81527c7..a68c7aeb 100644
--- a/src/test/java/org/qortal/test/common/transaction/CreateGroupTestTransaction.java
+++ b/src/test/java/org/qortal/test/common/transaction/CreateGroupTestTransaction.java
@@ -14,7 +14,6 @@ public class CreateGroupTestTransaction extends TestTransaction {
 	public static TransactionData randomTransaction(Repository repository, PrivateKeyAccount account, boolean wantValid) throws DataException {
 		Random random = new Random();
 
-		String owner = account.getAddress();
 		String groupName = "test group " + random.nextInt(1_000_000);
 		String description = "random test group";
 		final boolean isOpen = false;
@@ -22,7 +21,7 @@ public class CreateGroupTestTransaction extends TestTransaction {
 		final int minimumBlockDelay = 5;
 		final int maximumBlockDelay = 20;
 
-		return new CreateGroupTransactionData(generateBase(account), owner, groupName, description, isOpen, approvalThreshold, minimumBlockDelay, maximumBlockDelay);
+		return new CreateGroupTransactionData(generateBase(account), groupName, description, isOpen, approvalThreshold, minimumBlockDelay, maximumBlockDelay);
 	}
 
 }
diff --git a/src/test/java/org/qortal/test/group/GroupBlockDelayTests.java b/src/test/java/org/qortal/test/group/GroupBlockDelayTests.java
index 1af2857f..b4375fe0 100644
--- a/src/test/java/org/qortal/test/group/GroupBlockDelayTests.java
+++ b/src/test/java/org/qortal/test/group/GroupBlockDelayTests.java
@@ -60,13 +60,12 @@ public class GroupBlockDelayTests extends Common {
 	}
 
 	private CreateGroupTransaction buildCreateGroupWithDelays(Repository repository, PrivateKeyAccount account, int minimumBlockDelay, int maximumBlockDelay) throws DataException {
-		String owner = account.getAddress();
 		String groupName = "test group";
 		String description = "random test group";
 		final boolean isOpen = false;
 		ApprovalThreshold approvalThreshold = ApprovalThreshold.PCT40;
 
-		CreateGroupTransactionData transactionData = new CreateGroupTransactionData(TestTransaction.generateBase(account), owner, groupName, description, isOpen, approvalThreshold, minimumBlockDelay, maximumBlockDelay);
+		CreateGroupTransactionData transactionData = new CreateGroupTransactionData(TestTransaction.generateBase(account), groupName, description, isOpen, approvalThreshold, minimumBlockDelay, maximumBlockDelay);
 		return new CreateGroupTransaction(repository, transactionData);
 	}
 
diff --git a/src/test/java/org/qortal/test/group/MiscTests.java b/src/test/java/org/qortal/test/group/MiscTests.java
new file mode 100644
index 00000000..95808d14
--- /dev/null
+++ b/src/test/java/org/qortal/test/group/MiscTests.java
@@ -0,0 +1,59 @@
+package org.qortal.test.group;
+
+import static org.junit.Assert.assertTrue;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.qortal.account.PrivateKeyAccount;
+import org.qortal.data.transaction.CreateGroupTransactionData;
+import org.qortal.group.Group.ApprovalThreshold;
+import org.qortal.repository.DataException;
+import org.qortal.repository.Repository;
+import org.qortal.repository.RepositoryManager;
+import org.qortal.test.common.Common;
+import org.qortal.test.common.TransactionUtils;
+import org.qortal.test.common.transaction.TestTransaction;
+import org.qortal.transaction.Transaction;
+import org.qortal.transaction.Transaction.ValidationResult;
+
+public class MiscTests extends Common {
+
+	@Before
+	public void beforeTest() throws DataException {
+		Common.useDefaultSettings();
+	}
+
+	@After
+	public void afterTest() throws DataException {
+		Common.orphanCheck();
+	}
+
+	@Test
+	public void testCreateGroupWithExistingName() throws DataException {
+		try (final Repository repository = RepositoryManager.getRepository()) {
+			// Register-name
+			PrivateKeyAccount alice = Common.getTestAccount(repository, "alice");
+			String groupName = "test-group";
+			String description = "test group";
+
+			final boolean isOpen = false;
+			ApprovalThreshold approvalThreshold = ApprovalThreshold.PCT40;
+			int minimumBlockDelay = 10;
+			int maximumBlockDelay = 1440;
+
+			CreateGroupTransactionData transactionData = new CreateGroupTransactionData(TestTransaction.generateBase(alice), groupName, description, isOpen, approvalThreshold, minimumBlockDelay, maximumBlockDelay);
+			TransactionUtils.signAndMint(repository, transactionData, alice);
+
+			// duplicate
+			String duplicateGroupName = "TEST-gr0up";
+			transactionData = new CreateGroupTransactionData(TestTransaction.generateBase(alice), duplicateGroupName, description, isOpen, approvalThreshold, minimumBlockDelay, maximumBlockDelay);
+			Transaction transaction = Transaction.fromData(repository, transactionData);
+			transaction.sign(alice);
+
+			ValidationResult result = transaction.importAsUnconfirmed();
+			assertTrue("Transaction should be invalid", ValidationResult.OK != result);
+		}
+	}
+
+}
diff --git a/src/test/resources/test-chain-v2-qora-holder-extremes.json b/src/test/resources/test-chain-v2-qora-holder-extremes.json
index 2bd65c5f..2962f7a7 100644
--- a/src/test/resources/test-chain-v2-qora-holder-extremes.json
+++ b/src/test/resources/test-chain-v2-qora-holder-extremes.json
@@ -62,7 +62,7 @@
 			{ "type": "GENESIS", "recipient": "QaUpHNhT3Ygx6avRiKobuLdusppR5biXjL", "amount": "637557960.49687541", "assetId": 1 },
 			{ "type": "GENESIS", "recipient": "Qci5m9k4rcwe4ruKrZZQKka4FzUUMut3er", "amount": "0.666", "assetId": 1 },
 
-			{ "type": "CREATE_GROUP", "creatorPublicKey": "2tiMr5LTpaWCgbRvkPK8TFd7k63DyHJMMFFsz9uBf1ZP", "owner": "QgV4s3xnzLhVBEJxcYui4u4q11yhUHsd9v", "groupName": "dev-group", "description": "developer group", "isOpen": false, "approvalThreshold": "PCT100", "minimumBlockDelay": 0, "maximumBlockDelay": 1440 },
+			{ "type": "CREATE_GROUP", "creatorPublicKey": "2tiMr5LTpaWCgbRvkPK8TFd7k63DyHJMMFFsz9uBf1ZP", "groupName": "dev-group", "description": "developer group", "isOpen": false, "approvalThreshold": "PCT100", "minimumBlockDelay": 0, "maximumBlockDelay": 1440 },
 
 			{ "type": "ISSUE_ASSET", "issuerPublicKey": "2tiMr5LTpaWCgbRvkPK8TFd7k63DyHJMMFFsz9uBf1ZP", "assetName": "TEST", "description": "test asset", "data": "", "quantity": 1000000, "isDivisible": true, "fee": 0 },
 			{ "type": "ISSUE_ASSET", "issuerPublicKey": "C6wuddsBV3HzRrXUtezE7P5MoRXp5m3mEDokRDGZB6ry", "assetName": "OTHER", "description": "other test asset", "data": "", "quantity": 1000000, "isDivisible": true, "fee": 0 },
diff --git a/src/test/resources/test-chain-v2-qora-holder.json b/src/test/resources/test-chain-v2-qora-holder.json
index 63186eb9..11ccb0b0 100644
--- a/src/test/resources/test-chain-v2-qora-holder.json
+++ b/src/test/resources/test-chain-v2-qora-holder.json
@@ -62,7 +62,7 @@
 			{ "type": "GENESIS", "recipient": "QaUpHNhT3Ygx6avRiKobuLdusppR5biXjL", "amount": "10000", "assetId": 1 },
 			{ "type": "GENESIS", "recipient": "Qci5m9k4rcwe4ruKrZZQKka4FzUUMut3er", "amount": "8", "assetId": 1 },
 
-			{ "type": "CREATE_GROUP", "creatorPublicKey": "2tiMr5LTpaWCgbRvkPK8TFd7k63DyHJMMFFsz9uBf1ZP", "owner": "QgV4s3xnzLhVBEJxcYui4u4q11yhUHsd9v", "groupName": "dev-group", "description": "developer group", "isOpen": false, "approvalThreshold": "PCT100", "minimumBlockDelay": 0, "maximumBlockDelay": 1440 },
+			{ "type": "CREATE_GROUP", "creatorPublicKey": "2tiMr5LTpaWCgbRvkPK8TFd7k63DyHJMMFFsz9uBf1ZP", "groupName": "dev-group", "description": "developer group", "isOpen": false, "approvalThreshold": "PCT100", "minimumBlockDelay": 0, "maximumBlockDelay": 1440 },
 
 			{ "type": "ISSUE_ASSET", "issuerPublicKey": "2tiMr5LTpaWCgbRvkPK8TFd7k63DyHJMMFFsz9uBf1ZP", "assetName": "TEST", "description": "test asset", "data": "", "quantity": 1000000, "isDivisible": true, "fee": 0 },
 			{ "type": "ISSUE_ASSET", "issuerPublicKey": "C6wuddsBV3HzRrXUtezE7P5MoRXp5m3mEDokRDGZB6ry", "assetName": "OTHER", "description": "other test asset", "data": "", "quantity": 1000000, "isDivisible": true, "fee": 0 },
diff --git a/src/test/resources/test-chain-v2.json b/src/test/resources/test-chain-v2.json
index 6ab9002b..1939f357 100644
--- a/src/test/resources/test-chain-v2.json
+++ b/src/test/resources/test-chain-v2.json
@@ -59,7 +59,7 @@
 			{ "type": "GENESIS", "recipient": "QaUpHNhT3Ygx6avRiKobuLdusppR5biXjL", "amount": "1000000" },
 			{ "type": "GENESIS", "recipient": "Qci5m9k4rcwe4ruKrZZQKka4FzUUMut3er", "amount": "1000000" },
 
-			{ "type": "CREATE_GROUP", "creatorPublicKey": "2tiMr5LTpaWCgbRvkPK8TFd7k63DyHJMMFFsz9uBf1ZP", "owner": "QgV4s3xnzLhVBEJxcYui4u4q11yhUHsd9v", "groupName": "dev-group", "description": "developer group", "isOpen": false, "approvalThreshold": "PCT100", "minimumBlockDelay": 0, "maximumBlockDelay": 1440 },
+			{ "type": "CREATE_GROUP", "creatorPublicKey": "2tiMr5LTpaWCgbRvkPK8TFd7k63DyHJMMFFsz9uBf1ZP", "groupName": "dev-group", "description": "developer group", "isOpen": false, "approvalThreshold": "PCT100", "minimumBlockDelay": 0, "maximumBlockDelay": 1440 },
 
 			{ "type": "ISSUE_ASSET", "issuerPublicKey": "2tiMr5LTpaWCgbRvkPK8TFd7k63DyHJMMFFsz9uBf1ZP", "assetName": "TEST", "description": "test asset", "data": "", "quantity": "1000000", "isDivisible": true, "fee": 0 },
 			{ "type": "ISSUE_ASSET", "issuerPublicKey": "C6wuddsBV3HzRrXUtezE7P5MoRXp5m3mEDokRDGZB6ry", "assetName": "OTHER", "description": "other test asset", "data": "", "quantity": "1000000", "isDivisible": true, "fee": 0 },