Open Address Ninja from your Apps list. On the welcome screen, click Prevent Malformatted DHL Information. Click Activate. You can customize error messages for missing or incorrect Postnummer, Filialnummer, and more. This feature also applies to Germany and cannot be used at the same time as the block-all-DHL option.
DHL format validation also runs when the customer completes checkout, including when an address is already saved. Test the final checkout step with an invalid German DHL address after activating the check. This update does not change the Germany-only restriction or the conflict with block-all-DHL.