So you haven’t obtained a re-entry permit yet and would leave the country, just being stamped out? In that case yes, the visa would get canceled out and you’d lose all privileges under it (which is what you want anyway). Immigration tells you to still cancel it prior to leaving with a letter of the school but you can probably ignore that as the exit w/o RE would do the same.
Make sure you properly cancel that visa at Immigration prior to leaving the country or you won’t be able to get a new one. What documents are required depends on the Thai embassy/consulate you apply at.
You can apply online via eVisa system. That being said, it’s 350 Euro fee in Germany and in Vientiane you’d just pay 10,000 Baht and get a proper visa label in the passport rather than having to drag the evisa printout with you for 5 years.
Had no problem with Bangkok Bank and others got one at K-Bank. You might have to try a few branches. Be presentable when you go in and have cash on hand. 😉 Sure you can set up Wise from anywhere provided it’s offered in your home country.
It depends on the branch, each manager makes their own rules even though it should be corporate policy. Not sure what other customers have to do with this though. And again (for the third time): What is your nationality?
A branch at a major shopping mall in Bangkok (Ploenchit). Maybe Chiang Mai is the issue here but it could also be a case of having the “wrong” passport or (no offense to you personally) how the customer presents himself. I always suggest to dress as formal as possible when dealing with business/official situations in Thailand. You could also contact the banks head office and get an official answer from them but except SCB you should be fine with most banks.