Yes, the Ranong visa run is still possible as of May 2024, and recent feedback indicates that it can be a smooth process. However, challenges may arise depending on what visa you currently hold. If you're returning without a visa and intend to enter under visa exemption, you may need to provide additional documentation, including proof of sufficient funds and a return ticket.
As mentioned, it's was done last week trouble free. But I think it'll depend on. What visa you have, if any. From what I've read, if your leaving to return without a visa and wanting to enter visa exempt, then it can be difficult as they apparently want all the proof. The ฿20k, the departure ticket, the boarding for the full term
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