diff --git a/README.md b/README.md
index 74a78e3..69ac3e7 100644
--- a/README.md
+++ b/README.md
@@ -2026,6 +2026,7 @@ verifyIdentity({orderId: '123456789AAA'})
     and Mein O2)
 -   `500`: Internal error (e.g., unexpected error thrown by identity
     verification SDK)
+-   `503`: Feature is disabled.
 -   `505`: Identity verification flow is not supported on this device (Android
     < 9)
 
diff --git a/src/identity-verification.ts b/src/identity-verification.ts
index bed072e..3e0ecc8 100644
--- a/src/identity-verification.ts
+++ b/src/identity-verification.ts
@@ -9,6 +9,7 @@ import {postMessageToNativeApp} from './post-message';
  * - 204: Flow was cancelled (e.g., closed manually by the user)
  * - 405: Feature not supported in current brand (only available in Mein Blau and Mein O2)
  * - 500: Internal error (e.g., unexpected error thrown by identity verification SDK)
+ * - 503: Feature is disabled.
  * - 505: Identity verification flow is not supported on this device (Android < 9)
  */
 export const verifyIdentity = ({orderId}: {orderId: string}): Promise<void> =>