diff --git a/src/MultiSigContractV2.sol b/src/MultiSigContractV2.sol
index 13864ac..114e795 100644
--- a/src/MultiSigContractV2.sol
+++ b/src/MultiSigContractV2.sol
@@ -16,4 +16,12 @@ import { DataLocation } from "@signprotocol/signprotocol-evm/src/models/DataLoca
  * @notice Enhanced multisig contract with comprehensive security features and governance
  * @dev Includes timelock, emergency functions, role management, and advanced attestation features
  */
-contract MultiSigContractV2 is Ownable, ReentrancyGuard, Pausable { }
+contract MultiSigContractV2 is Ownable, ReentrancyGuard, Pausable {
+    ////////////////////
+    // Custom Errors //
+    //////////////////
+
+    error MultiSigContract__OnlyFactoryTokenContract();
+    error MultiSigContract__OnlySigner();
+    error MultiSigContract__AlreadySigned();
+}