TM 30 For your information - Went into Chiang Mai immigration today to update my TM30 after spending Saturday night in Mae Hong Son. I was told that I didn't need to update my TM30 even though I spent the night out of the province. Will this be true tomorrow - who knows.
TLDR : Answer Summary
This discussion addresses the requirements for updating the TM30 form after traveling within Thailand. Users report conflicting information about whether an update is necessary when returning to one's primary address after domestic travel. Generally, it appears that updates are only required after international trips, although some immigration offices may have different policies.