My grandfather worked for the German Post office May 1940 to end of war. I have a copy of a letter that my grandfather received in August 1944 while he was living there asking/ordering him to relocate to Ulm, Germany by September 1944. This copy I have indicates when he started, group number 8 ortsklasse. If I was to get in touch with the Dienststelle and send a scanned copy of both sides, would it help to locate the records faster?
Unfortunately, my last name is different from his, but I do have a long form copy of my birth certificate and marriage certificate of my parents. My grandfather's name appears on the marriage certificate so I can prove a connection. Also, would these records indicate previous military information or citizenship?