My son is visiting me in Bangkok and wants to extend his stay. He extended it at the Immigration offices in Nonthaburi and after 30 days we took a trip to Malaysia. The visitors visa will expire in 2 weeks’ time. What is his best option. Will they allow him another extension or must he do a border run? Thanks for helping.
TLDR : Answer Summary
Your son can apply for another extension if he hasn't already extended his visa on this new entry after returning from Malaysia. If he was stamped in for a 30-day visa exemption upon arrival, he is eligible to extend that for another 30 days as long as he meets the extension requirements.