IDL or Thai. But depending on where you are can use your home license but I would suggest carrying your passport then if you go that route. Worst case you get ticket and pay fine. Unlikely you will be screwed about having your bike or car get towed (very rare and you have to be a real asshole) since it’s a rental.
if they send you back to the bank for new docs they won’t penalize you. But yeah I go same day but I give them a heads up at the bank the day before and make appointment for first am.