diff --git a/modules/sdk-coin-canton/src/lib/cosignDelegationProposalBuilder.ts b/modules/sdk-coin-canton/src/lib/cosignDelegationProposalBuilder.ts
index a813461acb..3bff4ba9a8 100644
--- a/modules/sdk-coin-canton/src/lib/cosignDelegationProposalBuilder.ts
+++ b/modules/sdk-coin-canton/src/lib/cosignDelegationProposalBuilder.ts
@@ -7,6 +7,7 @@ import { Transaction } from './transaction/transaction';
 export class CosignDelegationProposalBuilder extends TransactionBuilder {
   private _contractId: string;
   private _operatorId: string;
+  private _updateId: string;
   private _packageName?: string;
 
   constructor(_coinConfig: Readonly<CoinConfig>) {
@@ -63,6 +64,22 @@ export class CosignDelegationProposalBuilder extends TransactionBuilder {
     return this;
   }
 
+  /**
+   * Sets the incoming txn id (updateId of the ledger update)
+   * @param id - ledger update id
+   * @returns The current builder instance for chaining.
+   * @throws Error if id is empty.
+   */
+  updateId(id: string): this {
+    if (!id || !id.trim()) {
+      throw new Error('updateId must be a non-empty string');
+    }
+    this._updateId = id.trim();
+    // also set the transaction id
+    this.transaction.id = id.trim();
+    return this;
+  }
+
   /**
    * Sets the optional package name
    * @param name - package name
@@ -85,6 +102,7 @@ export class CosignDelegationProposalBuilder extends TransactionBuilder {
     const result: CosignDelegationProposal = {
       contractId: this._contractId,
       operatorId: this._operatorId,
+      updateId: this._updateId,
     };
     if (this._packageName !== undefined) {
       result.packageName = this._packageName;
@@ -101,5 +119,6 @@ export class CosignDelegationProposalBuilder extends TransactionBuilder {
   private validate(): void {
     if (!this._contractId) throw new Error('contractId is missing');
     if (!this._operatorId) throw new Error('operatorId is missing');
+    if (!this._updateId) throw new Error('updateId is missing');
   }
 }
diff --git a/modules/sdk-coin-canton/src/lib/iface.ts b/modules/sdk-coin-canton/src/lib/iface.ts
index b668688213..8d40f0079b 100644
--- a/modules/sdk-coin-canton/src/lib/iface.ts
+++ b/modules/sdk-coin-canton/src/lib/iface.ts
@@ -156,6 +156,7 @@ export interface TransferAcknowledge {
 export interface CosignDelegationProposal {
   contractId: string;
   operatorId: string;
+  updateId: string;
   packageName?: string;
 }
 
diff --git a/modules/sdk-coin-canton/test/unit/builder/cosignDelegationProposal/cosignDelegationProposalBuilder.ts b/modules/sdk-coin-canton/test/unit/builder/cosignDelegationProposal/cosignDelegationProposalBuilder.ts
index 03bb440da0..0d4aa80cbb 100644
--- a/modules/sdk-coin-canton/test/unit/builder/cosignDelegationProposal/cosignDelegationProposalBuilder.ts
+++ b/modules/sdk-coin-canton/test/unit/builder/cosignDelegationProposal/cosignDelegationProposalBuilder.ts
@@ -9,40 +9,39 @@ import { CosignDelegationProposal } from '../../../../src/lib/iface';
 const contractId =
   '001b549bfa833bab661ab30e4d0a3ab0ec01fcc4a2bef5369795f4928147706353ca1112205a8d0e780cf3b3115cf8be0d6315f4aed6a1c25b67e8c5d64cf9848d0458fd17';
 const operatorId = '12205::12205b4e3537a95126d90604592344d8ad3c3ddccda4f79901954280ee19c576714d';
+const updateId = '1220d1d1d1d1d1d1d1d1d1d1d1d1d1d1d1d1d1d1d1d1d1d1d1d1d1d1d1d1d1d1d1d1';
 const packageName = 'splice-amulet';
-const submissionId = '12205b4e3537a95126d90604592344d8ad3c3ddccda4f79901954280ee19c576714d';
 
 describe('CosignDelegationProposal Builder', () => {
   it('should get the cosign delegation proposal request object', function () {
     const txBuilder = new CosignDelegationProposalBuilder(coins.get('tcanton'));
     const tx = new Transaction(coins.get('tcanton'));
-    tx.id = submissionId;
     txBuilder.initBuilder(tx);
-    txBuilder.contractId(contractId).operatorId(operatorId).packageName(packageName);
+    txBuilder.contractId(contractId).operatorId(operatorId).updateId(updateId).packageName(packageName);
     const requestObj: CosignDelegationProposal = txBuilder.toRequestObject();
     should.exist(requestObj);
     assert.equal(requestObj.contractId, contractId);
     assert.equal(requestObj.operatorId, operatorId);
+    assert.equal(requestObj.updateId, updateId);
     assert.equal(requestObj.packageName, packageName);
   });
 
   it('should get the cosign delegation proposal request object without packageName', function () {
     const txBuilder = new CosignDelegationProposalBuilder(coins.get('tcanton'));
     const tx = new Transaction(coins.get('tcanton'));
-    tx.id = submissionId;
     txBuilder.initBuilder(tx);
-    txBuilder.contractId(contractId).operatorId(operatorId);
+    txBuilder.contractId(contractId).operatorId(operatorId).updateId(updateId);
     const requestObj: CosignDelegationProposal = txBuilder.toRequestObject();
     should.exist(requestObj);
     assert.equal(requestObj.contractId, contractId);
     assert.equal(requestObj.operatorId, operatorId);
+    assert.equal(requestObj.updateId, updateId);
     assert.equal(requestObj.packageName, undefined);
   });
 
   it('should throw if contractId is missing', function () {
     const txBuilder = new CosignDelegationProposalBuilder(coins.get('tcanton'));
     const tx = new Transaction(coins.get('tcanton'));
-    tx.id = submissionId;
     txBuilder.initBuilder(tx);
     txBuilder.operatorId(operatorId);
     assert.throws(() => txBuilder.toRequestObject(), /contractId is missing/);
@@ -51,7 +50,6 @@ describe('CosignDelegationProposal Builder', () => {
   it('should throw if operatorId is missing', function () {
     const txBuilder = new CosignDelegationProposalBuilder(coins.get('tcanton'));
     const tx = new Transaction(coins.get('tcanton'));
-    tx.id = submissionId;
     txBuilder.initBuilder(tx);
     txBuilder.contractId(contractId);
     assert.throws(() => txBuilder.toRequestObject(), /operatorId is missing/);
@@ -60,7 +58,6 @@ describe('CosignDelegationProposal Builder', () => {
   it('should throw if contractId is empty string', function () {
     const txBuilder = new CosignDelegationProposalBuilder(coins.get('tcanton'));
     const tx = new Transaction(coins.get('tcanton'));
-    tx.id = submissionId;
     txBuilder.initBuilder(tx);
     assert.throws(() => txBuilder.contractId(''), /contractId must be a non-empty string/);
   });
@@ -68,7 +65,6 @@ describe('CosignDelegationProposal Builder', () => {
   it('should throw if operatorId is empty string', function () {
     const txBuilder = new CosignDelegationProposalBuilder(coins.get('tcanton'));
     const tx = new Transaction(coins.get('tcanton'));
-    tx.id = submissionId;
     txBuilder.initBuilder(tx);
     assert.throws(() => txBuilder.operatorId(''), /operatorId must be a non-empty string/);
   });