Morning all,
I'd appreciate if someone would confirm the current Chiang mai immigration that assists with the issuance of Embassy letter supported extensions of stay. Would it be Promenada mail or the airport office? TIA
TLDR : Answer Summary
The current immigration office in Chiang Mai that assists with the issuance of Embassy letter-supported extensions of stay is confirmed to be Promenada Mall. Users have reported successfully obtaining a 30-day extension there, while also noting that other locations may redirect you back to Promenada.