Short answer: riding a motorbike with no registration certificate — or with one that has expired, been tampered with, or does not match the bike’s frame and engine numbers — is a violation under Article 14(2) of Decree 168/2024/NĐ-CP at 2,000,000–3,000,000 VND. The bike can be held until the paperwork is resolved, and where the machine’s lawful origin cannot be shown, the vehicle itself can be confiscated.
What the registration certificate is
The chứng nhận đăng ký xe is the bike’s identity document: it ties the frame number and engine number to a lawful first registration, and it is what every other duty hangs from — plates, compulsory insurance, camera fines. A rider who carries the paper at a stop has met the carriage duty; a rider whose bike was never registered, or whose paper does not match the machine, has a much bigger problem than a forgotten wallet.
The band and what sits inside it
Article 14(2) of the decree prices the family at 2–3 million VND: riding without the certificate; using one that has expired or lost validity; using a tampered certificate; using one issued for a different frame or engine number, or issued by no competent authority; riding a temporarily registered bike outside its stated route or time limit. The band deliberately mixes “never registered” with “paper is wrong” — to the system, an unverifiable bike is an unverifiable bike.
The follow-up measures are the sharp edge. Under Article 14(5)(b), a bike whose paper is missing or fake and whose lawful origin cannot be proven can be confiscated outright — the fine becomes the small line item. Under Articles 14(6)(b) and 14(7), tampered papers are forcibly surrendered and improper certificates revoked. And under Article 48, the bike can be held on the spot pending the resolution.
How riders end up in this band innocently — and not
The innocent versions exist: a newly bought bike in the gap before registration (temporarily registered, and legal only within that registration’s scope), a lost certificate not yet reissued. The system’s answer to both is the same — fix the paper before riding beyond what the temporary registration allows. The not-innocent versions are the expensive ones: assembled bikes, bikes with filed numbers, cheap “no-paper” purchases that turned out to be someone else’s stolen machine. For visitors, the rental handover is the checkpoint: the registration copy under the seat should match the bike, match the plates, and look like what it is. A shop that cannot produce identity paper for the machine it is renting is renting you a confiscation risk with a seat on it.
Information, not legal advice. Verified against Decree 168/2024/NĐ-CP on 2026-09-22.