that's what I found on REDDIT about a border run in Chiang Khong to Huayxai : "For anyone doing the border run from northern Thailand (closest land crossing to Chiang Mai and Chiang Rai) you can no longer turn around and immediately get back on the bus back to Thailand after getting your Laos stamp/visa. They are now requiring a two day stay in Laos before returning. When you do come back you need to have proof of 10,000 bhat, T30 and proof of exit (flight info).
I did this run 3 months ago and it was not in effect back then. Not sure if this is just this crossing or all land crossings. I read some comments that say it’s shady and the head of the immigration here must be getting some kind of cut from the Laos side. No idea the truth of that but I do know there are signs everywhere and all the agents and peripheral businesses act like this is the new normal.
The guy that runs the daily van from Chiang Mai says he can still get you in and out the same day because he’s so connected in there and that’s his whole business but again, can’t say for sure. All I know is I’m spending an unexpected two days in Laos, which is fine, just wish I planned for it better so that’s why I’m telling you."
Brandon's response it 100% correct, only the part that regards the proof of cash money, the sum can asked to show can be 20,000 THB per person, not only 10,000 THB. Depending on the officer you are standing in front of . . . . and if you use a border run agency, they are well worth their service payment, as they will make your border bounce possible within the same day
you need to take the bus to Chiang Khong and exit Thailand, take the shuttle bus across the Thai/Lao friendship bridge, buy a "visa-on-arrival" for Laos for 40 USD or 1900 THB. You MAYBE will have to stay on the Laos side for one or two nights, before you will be able to return to Thailand. Prepare accordingly: You need to carry CASH on you equivalent of 20,000 THB (not only 10,000 as Brandon stated!) you need proof of an accomodation for the first few nights afer entry, and you need a proof of onward travel out of Thailand within these 60 days. All these three proofs can be asked of you from the Thai Immigration. . . . Keep in mind to check the entry stamp carefully that they will grant you a 60-days stay permit on a visa-exempt entry
you can get the 60 days extension issued if your marriage is acknowledged inside Thailand, and you need to show a freshly printed Kor Ror 22 or Kor Ror 2 (whichever applies) from the Amphur. Or preferably the rose bordered marriage certificate (Kor Ror 3)
be prepared to get pulled aside, inquired, warned not do try it again too soon, and being made to show the famous three proofs (cash, accomodation, onward travel)
You’re allowed to report up to 15 days before or 7 days after your due date, giving you a bit of flexibility. Missing this window, however, will cost you.
only the Immigration officer you will be standing in front of, can decide if he lets you enter on another 60-days visa exempt, or not. It is totally up to the discretion of this Immigration official. I know a guy who was pulled aside on the Suvarnabhumi Airport while he was going to enter visa-exempt for a second time, and got warned that this would be the last time they allow him to enter without a visa. He had to show proof of 20,000 THB cash, a proof of onward travel within the 60 days and proof of a booked accomodation for the next few nights. Only after being able to show these proofs, he was allowed to proceed. . . . so be warned - it also depends on your recent Thailand travel history and the number of stamps in your passport
well you wrote you now have the TM30 form. HOW are we supposed to understand this? With "form", do you mean the "TM30 receipt"? You need at least a screenshot or the printed receipt that proves you have already been TM30 registered as living in the condo, in the online TM30 system. If you show up on Immigration and they see that you have not been TM30 registered online, they will fine you with 2000.- THB