diff --git a/.changeset/tall-emus-fail.md b/.changeset/tall-emus-fail.md
new file mode 100644
index 00000000000..98d5775cb14
--- /dev/null
+++ b/.changeset/tall-emus-fail.md
@@ -0,0 +1,5 @@
+---
+"chainlink": patch
+---
+
+#internal Use txid as the idempotency key in the evm chainwriter
diff --git a/core/services/relay/evm/chain_writer.go b/core/services/relay/evm/chain_writer.go
index dad68f1bfdc..f188ffeced2 100644
--- a/core/services/relay/evm/chain_writer.go
+++ b/core/services/relay/evm/chain_writer.go
@@ -128,6 +128,7 @@ func (w *chainWriter) SubmitTransaction(ctx context.Context, contract, method st
 		EncodedPayload: calldata,
 		FeeLimit:       methodConfig.GasLimit,
 		Meta:           txMeta,
+		IdempotencyKey: &transactionID,
 		Strategy:       w.sendStrategy,
 		Checker:        checker,
 		Value:          *v,