I am a resident in Chiang Mai and currently hold an O visa, which allows for a single entry. Will be taking a holiday in Lao, exiting Thailand by land near Nan, and returning at the same crossing. Which would be more convenient (time): applying for a SE stamp at Chiang Mai IMO before the trip, or when returning from Lao to the Thai border? Has anyone experienced this at land crossings? Thank you.
TLDR : Answer Summary
The user, holding a single-entry O visa in Chiang Mai, seeks advice on whether to obtain a re-entry permit (SE stamp) before their trip to Laos or at the border upon returning. Comments suggest that re-entry permits are not available at land crossings, necessitating a visit to immigration in advance. Additionally, there's concern about Lao visa availability at the Huai Kon crossing.