Hi There..
I’m coming to the end of my last STV extension and I will be leaving the country before it expires.
I have a new passport that was issued a month ago, I haven’t transferred any extensions to this new passport.
Is that something I will need to do before leaving the country, or am I ok to just provide both passports on departure?
TLDR : Answer Summary
The person is nearing the end of their STV extension and is concerned about leaving Thailand with a new passport without transferring their visa extensions. Comments suggest it is acceptable to present both the old and new passports at departure, along with an embassy letter.