please help me with my little problem. today i tried to pickup a delivery from DHL which required an id check. the worker didn't accept my document (Duldung) because the system doesn't support it. contacting customer service didn't help either. the requirements listed by DHL to confirm an id is to have a document with a name, birthdate, photo, all of which is present on Duldung. can anyone tell me what is a legal status of this document and provide a link. thanks.