The housing benefit office in Erlangen assigns each applicant to a caseworker by the first letters of the surname. Its page in the Bavarian service portal lists ten ranges, each with its own room and direct line. One reads Buchstabenbereich HAJ – KRA, letter range HAJ to KRA, in room 424. The city of Bielefeld’s guardianship support unit works the same way: Die Zuständigkeit richtet sich nach dem Nachnamen des Kindes. Responsibility follows the child’s surname. Each letter has one caseworker, one room and one phone number.