diff --git a/packages/utils/src/ErrorContext.test.ts b/packages/utils/src/ErrorContext.test.ts
index fd3ef7160..14b14c719 100644
--- a/packages/utils/src/ErrorContext.test.ts
+++ b/packages/utils/src/ErrorContext.test.ts
@@ -93,8 +93,10 @@ describe("handleTezError", () => {
     expect(res).toBe("The delegate is unchanged. Delegation to this address is already done.");
   });
 
-  it("returns undefined for unknown errors", () => {
+  it("returns default text for unknown errors", () => {
     const err = new Error("unknown error");
-    expect(handleTezError(err)).toBeUndefined();
+    expect(handleTezError(err)).toBe(
+      "Tezos blockchain rejected the transaction: unknown error. Please try again or contact support if the issue persists."
+    );
   });
 });
diff --git a/packages/utils/src/ErrorContext.ts b/packages/utils/src/ErrorContext.ts
index 6e1a9bad6..9d078e9ff 100644
--- a/packages/utils/src/ErrorContext.ts
+++ b/packages/utils/src/ErrorContext.ts
@@ -36,6 +36,8 @@ export const handleTezError = (err: Error): string | undefined => {
     return "Emptying an implicit delegated account is not allowed. End delegation before trying again.";
   } else if (err.message.includes("delegate.unchanged")) {
     return "The delegate is unchanged. Delegation to this address is already done.";
+  } else if (err.message.includes("contract.manager.unregistered_delegate")) {
+    return "The provided delegate address is not registered as a delegate. Verify the delegate address and ensure it is active.";
   }
 };
 
@@ -59,7 +61,9 @@ export const getErrorContext = (error: any): ErrorContext => {
     description = error.message;
     technicalDetails = "";
   } else if (error instanceof Error) {
-    description = handleTezError(error) ?? description;
+    description =
+      handleTezError(error) ||
+      `Tezos blockchain rejected the transaction: ${error.message}. Please try again or contact support if the issue persists.`;
   }
 
   return {