diff --git a/.changeset/chilly-cars-attend.md b/.changeset/chilly-cars-attend.md
new file mode 100644
index 00000000000..2cb8323ab3c
--- /dev/null
+++ b/.changeset/chilly-cars-attend.md
@@ -0,0 +1,5 @@
+---
+"chainlink": minor
+---
+
+add error handle for gnosis chiado for seen tx #added
diff --git a/core/chains/evm/client/errors.go b/core/chains/evm/client/errors.go
index da122514743..1e4a7caefe8 100644
--- a/core/chains/evm/client/errors.go
+++ b/core/chains/evm/client/errors.go
@@ -259,6 +259,10 @@ var mantle = ClientErrors{
 	Fatal:           regexp.MustCompile(`(: |^)'*invalid sender`),
 }
 
+var gnosis = ClientErrors{
+	TransactionAlreadyInMempool: regexp.MustCompile(`(: |^)(alreadyknown)`),
+}
+
 const TerminallyStuckMsg = "transaction terminally stuck"
 
 // Tx.Error messages that are set internally so they are not chain or client specific
@@ -266,7 +270,7 @@ var internal = ClientErrors{
 	TerminallyStuck: regexp.MustCompile(TerminallyStuckMsg),
 }
 
-var clients = []ClientErrors{parity, geth, arbitrum, metis, substrate, avalanche, nethermind, harmony, besu, erigon, klaytn, celo, zkSync, zkEvm, mantle, aStar, internal}
+var clients = []ClientErrors{parity, geth, arbitrum, metis, substrate, avalanche, nethermind, harmony, besu, erigon, klaytn, celo, zkSync, zkEvm, mantle, aStar, gnosis, internal}
 
 // ClientErrorRegexes returns a map of compiled regexes for each error type
 func ClientErrorRegexes(errsRegex config.ClientErrors) *ClientErrors {
diff --git a/core/chains/evm/client/errors_test.go b/core/chains/evm/client/errors_test.go
index 72fa1347ec0..a75d37f2af7 100644
--- a/core/chains/evm/client/errors_test.go
+++ b/core/chains/evm/client/errors_test.go
@@ -136,6 +136,7 @@ func Test_Eth_Errors(t *testing.T) {
 			// This seems to be an erroneous message from the zkSync client, we'll have to match it anyway
 			{"ErrorObject { code: ServerError(3), message: \\\"known transaction. transaction with hash 0xf016…ad63 is already in the system\\\", data: Some(RawValue(\\\"0x\\\")) }", true, "zkSync"},
 			{"client error transaction already in mempool", true, "tomlConfig"},
+			{"alreadyknown", true, "Gnosis"},
 		}
 		for _, test := range tests {
 			err = evmclient.NewSendErrorS(test.message)