What is form 13.20 A and 13.20 B?
Last verified: 2026-06-20
The inspection report “form 13.20” documents the technical vehicle data for the cantonal road traffic office. The directives WPB 13.20 distinguish two versions:
| Form | Colour | Purpose |
|---|---|---|
| 13.20 A | chamois | first registration of vehicles in Switzerland or the Principality of Liechtenstein |
| 13.20 B | blue | reporting modifications under Art. 34 paras. 2–4 VTS |
For IVI vehicles — those marked “IVI” or “IVIX” in field 24 — fields 26a, b and d are additionally completed on the back. The “IVI” entry is made when importers import vehicles with an EU certificate of conformity (CoC/eCoC); an “X” (IVIX) is added when the importer refuses publication of data-protection-relevant information.
The 9-digit Stammnummer is assigned by the BAZG after checking customs clearance and noted on form 13.20 A.
Directives WPB 13.20 in force: version in force (As of: 2023-10-01)
Sources
- Directives WPB 13.20 (completing inspection reports form 13.20 A and 13.20 B) — ASTRA – Federal Roads Office
- Annex VI: BAZG – assignment of the Stammnummer after checking customs clearance — ASTRA / BAZG