diff --git a/src/client.ts b/src/client.ts
index 5a9b57f..9fb4d4b 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -240,6 +240,8 @@ export class RelayClient {
      */
     public async deploy(): Promise<RelayerTransactionResponse> {
         this.signerNeeded();
+        this.mustBeSafe();
+
         const safe = await this.getExpectedSafe();
 
         const deployed = await this.getDeployed(safe);
@@ -394,6 +396,12 @@ export class RelayClient {
         }
     }
 
+    private mustBeSafe(): void {
+        if (this.relayTxType != RelayerTxType.SAFE) {
+            throw new Error("operation only supported for safe tx type");
+        }
+    }
+
     private async getExpectedSafe(): Promise<string> {
         const address = await (this.signer as IAbstractSigner).getAddress();
         return deriveSafe(address, this.contractConfig.SafeContracts.SafeFactory);