Format, the B1 rule, and each part are on the DTZ B1 page.
Quick Answer
g.a.s.t. usually sends outcomes to the Federal Office for Migration and Refugees (BAMF) about two and a half weeks after the exam. BAMF then validates them. After validation, certificates and result sheets appear in the Prüfstelle portal. You collect the physical certificate from the test centre where you sat. A pass at A2 or B1 produces a certificate. A result below A2 produces a DTZ Ergebnisbogen. The two-and-a-half weeks is the usual handoff from g.a.s.t. to BAMF, and the certificate appears after BAMF validation.
For exams on or after 1 January 2023, results sit in the g.a.s.t. results database. The issuing approach is electronic: the centre downloads and can print the file more than once. To check a printed or digital certificate, use the g.a.s.t. DTZ verification flow (“Zertifikat verifizieren”) linked from the overview page.
Expiry and naturalisation
The FAQ checked in November 2026 does not state a fixed certificate expiry date, and it does not invite you to claim “never expires” either. The authority that reviews your naturalisation or residence file decides what proof it accepts; read which German language certificate you need for citizenship for exam choice, then confirm the live checklist with your office.
If the outcome is not enough
The FAQ allows repeats, but partial scores do not carry. Read DTZ retake rules before you book another full written and oral session.
Rebuild with the right clocks
Use the DTZ B1 mock walkthrough once you know where the weak paper sat — timing stress is easier to fix when you have already seen the stop notes between Hören, Lesen, and Schreiben.