Quick answer: Yes – when you drive a Swiss-registered car outside Switzerland, it must show the oval white “CH” country sign on the rear. Swiss plates carry the canton code and coat of arms but no international country code, so the CH sign is required in EU countries too (Germany, France, Italy, Austria …), not only outside Europe. Inside Switzerland you don’t need it.
Small, round, important: Why the CH sticker is needed for Swiss cars
Have you ever noticed the small white sticker marked “CH” on the back of cars and wondered why it matters? Far from being a decorative badge, the CH sign identifies the country where the vehicle is registered. Crossing a border without it can mean a fine at a roadside check and needless discussions after an accident abroad. Below you’ll find the rules, the correct placement and the most common questions.
Why the CH sticker is mandatory abroad
The requirement comes from the Vienna Convention on Road Traffic (1968) and the older Geneva Convention (1949). Both require vehicles in international traffic to carry the distinguishing sign of the country where they are registered.
- Swiss plates have no country code: EU plates with the blue EU band and country letters (“D”, “F”, “I”) count as the distinguishing sign within the EU. Swiss plates show the canton code and coats of arms, which do not replace it.
- Required in the EU as well: Because the EU-band exemption does not apply to Swiss plates, a CH sign is needed in neighbouring countries too – not only in countries outside the EU.
- Avoid fines and hassle: Police abroad can fine drivers for a missing country sign. Amounts vary by country; the easiest way to avoid the risk is a CH sticker or magnet that stays on the car.
- Trailers and caravans too: A trailer or caravan with Swiss plates needs its own CH sign on the back – the one on the towing car is hidden behind it.
“CH” stands for Confoederatio Helvetica, the Latin name of Switzerland, chosen to avoid favouring any of the four national languages.
What the CH sign must look like
- Shape: an oval (ellipse) with the long axis horizontal.
- Colours: black capital letters “CH” on a white background.
- Size: under the Vienna Convention the oval on a car must be at least 175 mm wide and 115 mm high; motorcycles may use a smaller sign (at least 115 × 70 mm).
- Sticker or magnet: both are accepted as long as the sign stays firmly attached and visible.
Proper placement of the CH sticker
- Place it on the rear of the vehicle, clearly visible to following traffic and police.
- Do not stick it on the licence plate itself or cover any part of the plate.
- A magnet on a plastic bumper will not hold – use a sticker there, or a magnet only on a steel tailgate.
- Check that it is still there after a car wash or a long motorway trip.
Where to get a CH sticker or magnet
CH stickers and magnets cost only a few francs and are sold at:
- Petrol stations and motorway shops near the border
- Cantonal road traffic offices (Strassenverkehrsamt / service des automobiles)
- TCS and car accessory shops, large hardware stores
- Online shops for car accessories
CH sticker checklist before a trip abroad
| Situation | CH sign needed? |
|---|---|
| Driving only in Switzerland | No |
| Swiss car in Germany, France, Italy, Austria or another EU country | Yes |
| Swiss car outside the EU (e.g. UK, Balkans, Turkey) | Yes |
| Swiss-registered trailer or caravan abroad | Yes, on the trailer itself |
| Liechtenstein-registered car (FL plates) | Needs the “FL” sign, not CH |
FAQ: CH sticker on Swiss cars
Why do Swiss cars have a CH sticker?
Because Swiss licence plates do not contain an international country code. The CH sign tells police and other drivers abroad that the car is registered in Switzerland, as required by the international road traffic conventions.
Is the CH sticker mandatory in Germany, France or Italy?
Yes. The EU-plate exemption only covers plates with the EU band and country code. Swiss plates don’t have it, so a CH sign is required in EU countries as well.
Is a CH sticker required in Switzerland?
No. In Switzerland you can drive without it. Many drivers simply leave it on permanently so they never forget it before crossing the border.
Do rental or company cars need one?
Yes, if they are registered in Switzerland and driven abroad. Ask the rental company – most Swiss rental cars already carry the sign.
What does CH stand for?
Confoederatio Helvetica – the Latin name of the Swiss Confederation.
Conclusion
The CH sticker is tiny but legally required whenever a Swiss-registered car leaves Switzerland – including trips to neighbouring EU countries. Put an oval white “CH” sign on the rear (and on your trailer), and you’re covered.
Planning a trip or preparing your car? Check our guides on the MFK vehicle inspection and car insurance in Switzerland, or find a trusted garage near you on cargpt.ch – the AI-powered platform for the Swiss car market.