I have a Condo lease agreement in udon thani. My sister who already has a Retirement visa and a BBL bank account in BKK would like to open a Kasikorn account in Udon Thani, I went with her to the UTH immigration and brought my lease and said my sister is staying with me and requested for a Certificate of residency. Besides the lease agreement, they wanted to see the ID and Blue book which was included in the lease agreement as well.
Starting from this year, when my Malaysian friend with Thai driver's licence flew from BKK - udon thani and back, they won't accept her driver's licence anymore, they asked for passport.
Grab pick up is on the outer lane once you exit the arrival hall.
The inner lane is for airport limousine. Cross to the outer lane, that's where Grab or personal pick up is located. Grab pick up will list several exit. Ensure you select and wait by the correct exit door.