diff --git a/packages/utils/src/ErrorContext.test.ts b/packages/utils/src/ErrorContext.test.ts
index db061c026e..e2defd2abe 100644
--- a/packages/utils/src/ErrorContext.test.ts
+++ b/packages/utils/src/ErrorContext.test.ts
@@ -101,6 +101,13 @@ describe("explainTezError", () => {
     expect(res).toBe("The delegate is unchanged. Delegation to this address is already done.");
   });
 
+  it("catches contract.manager.unregistered_delegate", () => {
+    const res = explainTezError("contract.manager.unregistered_delegate");
+    expect(res).toBe(
+      "The provided delegate address is not registered as a delegate. Verify the delegate address and ensure it is active."
+    );
+  });
+
   it("returns undefined for unknown errors", () => {
     const err = "unknown error";
     expect(explainTezError(err)).toBeUndefined();
diff --git a/packages/utils/src/ErrorContext.ts b/packages/utils/src/ErrorContext.ts
index 13d074d4df..364aecbe25 100644
--- a/packages/utils/src/ErrorContext.ts
+++ b/packages/utils/src/ErrorContext.ts
@@ -75,6 +75,8 @@ export const explainTezError = (err: string): string | undefined => {
     return "Emptying an implicit delegated account is not allowed. End delegation before trying again.";
   } else if (err.includes("delegate.unchanged")) {
     return "The delegate is unchanged. Delegation to this address is already done.";
+  } else if (err.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.";
   } else if (err.includes("michelson_v1.script_rejected")) {
     return "The contract code failed to run. Please check the contract.";
   }