A multiple entry tourist visa is valid for 6 months from issue. You get 60 days on each entry. If you enter just before its expiry date you can milk almost 9 months from that visa.
Mate it is possible. You just need the right agent. Almost certainly they won’t do it as a seperate service but only as a joint thing as opening the account and getting a Non O (and extension).
People have no idea that an overstay in Thailand can have consequences. They may have done 1,2,3 or whatever days and paid the fine at the airport and no other issues.
However what they don’t realise is that they got away with breaking the law (as most do). The unfortunate ones get caught at a police check point or similar and found on overstay and get incarcerated, sent to an immigration detention centre and deported at their expense.
Rarely happens but it does sometimes. This is why it’s horrible why so many people say it’s no issue to overstay. Because that shit hasn’t happened to them so assume it won’t happen to anyone.
On another side there’s plenty of stories from people that have had an overstay stamp in Thailand and subsequently denied a visa in a third party country because of it.
Where are you trying? Pattaya? If so you’re going to have issues. The issue with this group is that people don’t give enough information about their issues in order to help in many cases. They believe that everywhere in Thailand offers the same experience they’ve had and can’t accept that elsewhere may differ.
No issue. Bring both passports with you and show the officer your re-entry permit in the old passport. They’ll stamp you in on the new passport.
Then go to your local immigration office to get your extension stamp and re-entry (if multiple) placed in the new passport. Once done you can forget about having to need the old passport.