diff --git a/framework/src/modules/interoperability/mainchain/module.ts b/framework/src/modules/interoperability/mainchain/module.ts
index 034dd3db38..708775d529 100644
--- a/framework/src/modules/interoperability/mainchain/module.ts
+++ b/framework/src/modules/interoperability/mainchain/module.ts
@@ -261,15 +261,7 @@ export class MainchainInteroperabilityModule extends BaseInteroperabilityModule
 			throw new Error(`ownChainName must be equal to ${CHAIN_NAME_MAINCHAIN}.`);
 		}
 
-		// if chainInfos is empty, then ownChainNonce == 0
-		// If chainInfos is non-empty, ownChainNonce > 0
-		if (chainInfos.length === 0 && ownChainNonce !== BigInt(0)) {
-			throw new Error(`ownChainNonce must be 0 if chainInfos is empty.`);
-		} else if (chainInfos.length !== 0 && ownChainNonce <= BigInt(0)) {
-			throw new Error(`ownChainNonce must be positive if chainInfos is not empty.`);
-		}
-
-		this._verifyChainInfos(ctx, chainInfos, terminatedStateAccounts);
+		this._verifyChainInfos(ctx, chainInfos, ownChainNonce, terminatedStateAccounts);
 		this._verifyTerminatedStateAccounts(chainInfos, terminatedStateAccounts, mainchainID);
 		this._verifyTerminatedOutboxAccounts(
 			chainInfos,
@@ -284,8 +276,17 @@ export class MainchainInteroperabilityModule extends BaseInteroperabilityModule
 	private _verifyChainInfos(
 		ctx: GenesisBlockExecuteContext,
 		chainInfos: ChainInfo[],
+		ownChainNonce: bigint,
 		terminatedStateAccounts: TerminatedStateAccountWithChainID[],
 	) {
+		// if chainInfos is empty, then ownChainNonce == 0
+		// If chainInfos is non-empty, ownChainNonce > 0
+		if (chainInfos.length === 0 && ownChainNonce !== BigInt(0)) {
+			throw new Error(`ownChainNonce must be 0 if chainInfos is empty.`);
+		} else if (chainInfos.length !== 0 && ownChainNonce <= 0) {
+			throw new Error(`ownChainNonce must be positive if chainInfos is not empty.`);
+		}
+
 		// Each entry chainInfo in chainInfos has a unique chainInfo.chainID
 		const chainIDs = chainInfos.map(info => info.chainID);
 		if (!objectUtils.bufferArrayUniqueItems(chainIDs)) {
diff --git a/framework/test/unit/modules/interoperability/base_cross_chain_update_command.spec.ts b/framework/test/unit/modules/interoperability/base_cross_chain_update_command.spec.ts
index 5017a38fc8..51d4919429 100644
--- a/framework/test/unit/modules/interoperability/base_cross_chain_update_command.spec.ts
+++ b/framework/test/unit/modules/interoperability/base_cross_chain_update_command.spec.ts
@@ -94,6 +94,7 @@ describe('BaseCrossChainUpdateCommand', () => {
 		senderPublicKey,
 		signatures: [],
 	};
+	const minReturnFeePerByte = BigInt(10000000);
 
 	const certificate = codec.encode(certificateSchema, {
 		blockID: utils.getRandomBytes(32),
@@ -322,6 +323,19 @@ describe('BaseCrossChainUpdateCommand', () => {
 				.set(stateStore, params.sendingChainID, chainAccount);
 		});
 
+		it('should reject when ccu params validation fails', async () => {
+			const nonBufferSendingChainID = 2;
+			verifyContext = {
+				...verifyContext,
+				params: { ...params, sendingChainID: nonBufferSendingChainID } as any,
+			};
+
+			// 2nd param `isMainchain` could be false
+			await expect(command['verifyCommon'](verifyContext, false)).rejects.toThrow(
+				`Property '.sendingChainID' should pass "dataType" keyword validation`,
+			);
+		});
+
 		it('should call validator.validate with crossChainUpdateTransactionParams schema', async () => {
 			jest.spyOn(validator, 'validate');
 
@@ -1571,6 +1585,7 @@ describe('BaseCrossChainUpdateCommand', () => {
 	describe('bounce', () => {
 		const ccmStatus = CCMStatusCode.MODULE_NOT_SUPPORTED;
 		const ccmProcessedEventCode = CCMProcessedCode.MODULE_NOT_SUPPORTED;
+		const ccmSize = 100;
 		let stateStore: PrefixedStateReadWriter;
 
 		beforeEach(async () => {
@@ -1592,7 +1607,7 @@ describe('BaseCrossChainUpdateCommand', () => {
 			});
 
 			await expect(
-				command['bounce'](context, 100, ccmStatus, ccmProcessedEventCode),
+				command['bounce'](context, ccmSize, ccmStatus, ccmProcessedEventCode),
 			).resolves.toBeUndefined();
 
 			expect(context.eventQueue.getEvents()).toHaveLength(1);
@@ -1609,17 +1624,18 @@ describe('BaseCrossChainUpdateCommand', () => {
 		});
 
 		it('should log event when ccm.fee is less than min fee', async () => {
+			const minFee = minReturnFeePerByte * BigInt(ccmSize);
 			context = createCrossChainMessageContext({
 				ccm: {
 					...defaultCCM,
 					status: CCMStatusCode.OK,
-					fee: BigInt(1),
+					fee: minFee - BigInt(1),
 				},
 				stateStore,
 			});
 
 			await expect(
-				command['bounce'](context, 100, ccmStatus, ccmProcessedEventCode),
+				command['bounce'](context, ccmSize, ccmStatus, ccmProcessedEventCode),
 			).resolves.toBeUndefined();
 
 			expect(context.eventQueue.getEvents()).toHaveLength(1);
@@ -1649,7 +1665,7 @@ describe('BaseCrossChainUpdateCommand', () => {
 			});
 
 			await expect(
-				command['bounce'](context, 100, ccmStatus, ccmProcessedEventCode),
+				command['bounce'](context, ccmSize, ccmStatus, ccmProcessedEventCode),
 			).resolves.toBeUndefined();
 
 			expect(internalMethod.addToOutbox).toHaveBeenCalledWith(
@@ -1685,7 +1701,7 @@ describe('BaseCrossChainUpdateCommand', () => {
 			});
 
 			await expect(
-				command['bounce'](context, 100, ccmStatus, ccmProcessedEventCode),
+				command['bounce'](context, ccmSize, ccmStatus, ccmProcessedEventCode),
 			).resolves.toBeUndefined();
 
 			expect(internalMethod.addToOutbox).toHaveBeenCalledWith(
@@ -1715,7 +1731,7 @@ describe('BaseCrossChainUpdateCommand', () => {
 			});
 
 			await expect(
-				command['bounce'](context, 100, ccmStatus, ccmProcessedEventCode),
+				command['bounce'](context, ccmSize, ccmStatus, ccmProcessedEventCode),
 			).resolves.toBeUndefined();
 
 			expect(internalMethod.addToOutbox).toHaveBeenCalledWith(
@@ -1742,7 +1758,7 @@ describe('BaseCrossChainUpdateCommand', () => {
 			});
 
 			await expect(
-				command['bounce'](context, 100, ccmStatus, ccmProcessedEventCode),
+				command['bounce'](context, ccmSize, ccmStatus, ccmProcessedEventCode),
 			).resolves.toBeUndefined();
 
 			expect(context.eventQueue.getEvents()).toHaveLength(2);