Only someone empowered to do so: a translator authorised (in German ermächtigt, regionally also called beeidigt, vereidigt or öffentlich bestellt) by a Regional or Higher Regional Court. The label varies from one federal state to the next, but it means the same court-conferred authority. For written documents the correct term is a sworn, authorised translator; "sworn/appointed interpreter" strictly refers to spoken interpreting.
That authority is valid nationwide under Section 142 (3) ZPO — you do not need a translator from your own federal state. In legal terms the result is an "attested translation" (under state law). We assign your document to a person authorised for the target language, following the DIN EN ISO 17100 process with a second-person revision.
24,845 people are currently listed in the official interpreter and translator register of the German judicial authorities — court authorisation is a clearly defined qualification, not a claim. (Source: Landesjustizverwaltungen, as of 6 August 2026.)