Recently we’ve been receiving complaints from people who didn’t get their semester tickets. Aside from the usual problems (getting lost in the mail etc.) the problem might be that you have been chosen to test the campus card that is set to replace the paper tickets and needs to be picked up from one of the machines on campus. Apparently some people only received this information via Agnes, so if you haven’t gotten your ticket, you might want to check there.
Otherwise please contact the matriculation office/ Studierendenservicecenter, as they are responsible for sending out the documents.