diff --git a/packages/zevm-app-contracts/contracts/instant-rewards/InstantRewardsFactory.sol b/packages/zevm-app-contracts/contracts/instant-rewards/InstantRewardsFactory.sol
index 0c69f89..3a0560f 100644
--- a/packages/zevm-app-contracts/contracts/instant-rewards/InstantRewardsFactory.sol
+++ b/packages/zevm-app-contracts/contracts/instant-rewards/InstantRewardsFactory.sol
@@ -8,6 +8,11 @@ contract InstantRewardsFactory is Ownable2Step {
     bool public allowPublicCreation = false;
 
     error AccessDenied();
+    error InvalidSignerAddress();
+    error EmptyName();
+    error StartTimeInPast();
+    error EndTimeBeforeStart();
+
     event InstantRewardsCreated(address indexed instantRewards, address indexed owner);
 
     constructor(address owner) Ownable() {
@@ -24,6 +29,11 @@ contract InstantRewardsFactory is Ownable2Step {
         uint256 end,
         string memory name
     ) external returns (address) {
+        if (signerAddress == address(0)) revert InvalidSignerAddress();
+        if (bytes(name).length == 0) revert EmptyName();
+        if (start < block.timestamp) revert StartTimeInPast();
+        if (end <= start) revert EndTimeBeforeStart();
+
         bool isOwner = owner() == msg.sender;
         if (!allowPublicCreation && !isOwner) revert AccessDenied();