Official government portals

Direct answer

Apply only on a government host listed here. Lookalike domains that add hyphens, extra words, or a different public suffix are not the official portal. Last checked 16 August 2026 on the government sites themselves.

thailand

Thailand Immigration Bureau

Immigration Bureau notices, including Thailand Digital Arrival Card guidance.

immigration.go.th

thailand

Thailand Digital Arrival Card (TDAC)

Official digital arrival card. The Immigration Bureau states passengers must complete it. No fee on this official host.

tdac.immigration.go.th

thailand

Thailand e-Visa

Official e-Visa site of the Ministry of Foreign Affairs of Thailand.

thaievisa.go.th

vietnam

Vietnam National e-Visa

Official Vietnam Immigration Department e-Visa portal for foreigners applying personally.

evisa.gov.vn

vietnam

Vietnam e-Visa (thithucdientu.gov.vn)

Second official domain announced by the Vietnam Immigration Department for the electronic visa portal.

thithucdientu.gov.vn

vietnam

Vietnam pre-arrival form

Official pre-arrival form recommended by the Vietnam Immigration Department before entry.

prearrival.immigration.gov.vn