Guys and Gals probably good to have a message at top to direct to latest message. Re entry permit at the moment at BKK (suvarnabhum) is AFTER security and AFTER passport control. just ask staff if unsure. it's Immigration zone 2 far left side..I was in line at zone 1 and had to go into duty free turn left nd walk for 300m then left into Zone 2 and follow signs for ReEntry permit