When one answer is not enough
Do I need formal certification?
Answer
No, the BFSG prescribes no state certification or official approval. There is no government seal you must present to authorities. What matters is that you can document conformance yourself and provide evidence on request.
Concretely, the law requires an accessibility statement on your website that names the conformance status, the underlying standards and a feedback mechanism. This statement should be honest and verifiable, since inaccurate claims tend to increase rather than reduce your litigation risk.
The most robust basis for it is a documented WCAG audit with a traceable report. On request we also draft the wording for your accessibility statement from it.