diff --git a/modules/sdk-coin-sol/src/lib/constants.ts b/modules/sdk-coin-sol/src/lib/constants.ts
index 69848ae7ca..d13b8ab955 100644
--- a/modules/sdk-coin-sol/src/lib/constants.ts
+++ b/modules/sdk-coin-sol/src/lib/constants.ts
@@ -40,6 +40,7 @@ export enum ValidInstructionTypesEnum {
   DepositSol = 'DepositSol',
   WithdrawStake = 'WithdrawStake',
   Approve = 'Approve',
+  CustomInstruction = 'CustomInstruction',
 }
 
 // Internal instructions types
@@ -87,6 +88,7 @@ export const VALID_SYSTEM_INSTRUCTION_TYPES: ValidInstructionTypes[] = [
   ValidInstructionTypesEnum.Approve,
   ValidInstructionTypesEnum.DepositSol,
   ValidInstructionTypesEnum.WithdrawStake,
+  ValidInstructionTypesEnum.CustomInstruction,
 ];
 
 /** Const to check the order of the Wallet Init instructions when decode */
diff --git a/modules/sdk-coin-sol/src/lib/iface.ts b/modules/sdk-coin-sol/src/lib/iface.ts
index 36eaf81497..7d554a0d35 100644
--- a/modules/sdk-coin-sol/src/lib/iface.ts
+++ b/modules/sdk-coin-sol/src/lib/iface.ts
@@ -222,7 +222,8 @@ export type ValidInstructionTypes =
   | 'SetPriorityFee'
   | 'MintTo'
   | 'Burn'
-  | 'Approve';
+  | 'Approve'
+  | 'CustomInstruction';
 
 export type StakingAuthorizeParams = {
   stakingAddress: string;
diff --git a/modules/sdk-coin-sol/src/lib/transactionBuilderFactory.ts b/modules/sdk-coin-sol/src/lib/transactionBuilderFactory.ts
index 25dc9311ca..ee7260cebc 100644
--- a/modules/sdk-coin-sol/src/lib/transactionBuilderFactory.ts
+++ b/modules/sdk-coin-sol/src/lib/transactionBuilderFactory.ts
@@ -59,6 +59,8 @@ export class TransactionBuilderFactory extends BaseTransactionBuilderFactory {
           return this.getStakingDelegateBuilder(tx);
         case TransactionType.CloseAssociatedTokenAccount:
           return this.getCloseAtaInitializationBuilder(tx);
+        case TransactionType.CustomTx:
+          return this.getCustomInstructionBuilder(tx);
         default:
           throw new InvalidTransactionError('Invalid transaction');
       }
diff --git a/modules/sdk-coin-sol/src/lib/utils.ts b/modules/sdk-coin-sol/src/lib/utils.ts
index 5857130574..644607bb98 100644
--- a/modules/sdk-coin-sol/src/lib/utils.ts
+++ b/modules/sdk-coin-sol/src/lib/utils.ts
@@ -344,7 +344,7 @@ export function getTransactionType(transaction: SolTransaction): TransactionType
   } else if (matchTransactionTypeByInstructionsOrder(instructions, ataCloseInstructionIndexes)) {
     return TransactionType.CloseAssociatedTokenAccount;
   } else {
-    throw new NotSupported('Invalid transaction, transaction not supported or invalid');
+    return TransactionType.CustomTx;
   }
 }
 
@@ -371,8 +371,8 @@ export function getInstructionType(instruction: TransactionInstruction): ValidIn
       instructionTypeMap.set(TokenInstruction.Approve, 'Approve');
       instructionTypeMap.set(TokenInstruction.TransferChecked, 'TokenTransfer');
       const validInstruction = instructionTypeMap.get(decodedInstruction.data.instruction);
-      if (validInstruction === undefined) {
-        throw new Error(`Unsupported token instruction type ${decodedInstruction.data.instruction}`);
+      if (!validInstruction) {
+        return 'CustomInstruction';
       }
       return validInstruction;
     case STAKE_POOL_PROGRAM_ID.toString():
@@ -397,9 +397,7 @@ export function getInstructionType(instruction: TransactionInstruction): ValidIn
     case COMPUTE_BUDGET:
       return 'SetPriorityFee';
     default:
-      throw new NotSupported(
-        'Invalid transaction, instruction program id not supported: ' + instruction.programId.toString()
-      );
+      return 'CustomInstruction';
   }
 }
 
diff --git a/modules/sdk-coin-sol/test/unit/utils.ts b/modules/sdk-coin-sol/test/unit/utils.ts
index 141076551b..e93e540321 100644
--- a/modules/sdk-coin-sol/test/unit/utils.ts
+++ b/modules/sdk-coin-sol/test/unit/utils.ts
@@ -235,16 +235,14 @@ describe('SOL util library', function () {
       });
       Utils.getInstructionType(transferInstruction).should.equal('Transfer');
     });
-    it('should fail for invalid type ', function () {
+    it('should fallback to customInstruction for unsupported instructionType', function () {
       const voteAddress = 'Vote111111111111111111111111111111111111111';
       const invalidInstruction = new TransactionInstruction({
         keys: [],
         programId: new PublicKey(voteAddress),
         data: Buffer.from('random memo'),
       });
-      should(() => Utils.getInstructionType(invalidInstruction)).throwError(
-        'Invalid transaction, instruction program id not supported: ' + voteAddress
-      );
+      Utils.getInstructionType(invalidInstruction).should.equal('CustomInstruction');
     });
   });