Hi so went to update my TM 30 in Chiang Mai and she took my old one entered data in the system and gave me back the old one. Last time they gave me a new paper, I'm assuming I'm ok since they have new information in their data base?
TLDR : Answer Summary
When you update your TM 30 in Chiang Mai, it's not uncommon for the authorities to return your old document instead of issuing a new one, as long as they have updated their records with the new information. If they have processed the update and logged your information into their system, you should be fine.