Do you need a Vietnam e-visa before arrival or can you enter visa-free, and does the accommodation address on the entry form matter if you later change where you're staying?

For an e-visa application, it is best to provide the full accommodation address, including the building number and, if applicable, the apartment number. Naming only an apartment complex may be insufficient for approval, although applications can sometimes still be accepted in that format.

Border officers stamp your entry/exit dates regardless. If you don't want to deal with paperwork in advance, you can enter visa-free and get the stamp on arrival.

Russian citizens get 45 days visa-free. Alternatively, apply for a 90-day e-visa in advance. Border officers don't care which option you use.

Address mismatch isn't an issue: you can list one address (e.g. a hotel) on the e-visa and actually move to a long-term apartment a week later — no one checks.

Once you move in, it's the landlord's responsibility to register your residency with local police, regardless of what address you listed at entry — that's their headache, not yours.

Personal experience: the e-visa listed one address and the entry declaration listed a completely different one. Went through border control without any questions.