Section 22 ZustG provides that service is certified on the proof of service. In a handover, the date and the person who accepted the document are among the relevant details. The form of the record varies with the method of service.
For an initial review, secure the complete return receipt or service certificate, the address used, the shipment or file number, any electronic service data and communications with the authority. Where a representative accepted the document, record who accepted it and in what capacity.
A proof of service records the documented event. It does not automatically answer every question about effectiveness in an individual case. If the address, recipient, date or route is unclear, describe the uncertainty precisely by reference to the original documents.