Can I switch from one visa to another in Thailand without making a border run?

@Tom ***********

as people stated there is no "in country visa activation" AND you can't switch passports by land borders.

You wanna get off the hungarian passport you're on now and use the tourist visa in the auzzie passport you fly out and back.

you stamp out of thailand on the hungarian passport,

you stamp in to another country on the auzzie one,

you stamp out of that country on it

and

then stamping IN to thailand with it to get the tourist visa 60 day entry stamp

Have both passports with you when you re-enter and be ready to show them both. They know you have two and they often ask to see the other one.

You need to fly out on your Hungarian passport, enter another country whichever passport, then fly into Thailand and enter on your Australian passport with your SETV sticker on to switch your passports to Thailand. You cannot do it by land border crossing.

Also, a note for those with dual/multiple passports, you cannot swap passports at land borders: do it with an airport entry/exit or airport transit....

At land borders, border/immigration officers are going to ask for entry/exit between the two bordering countries in the same passport....

Must enter and exit on same passport.