Asking for my friend.
If you apply extension of stay from visa exempt entry at IO in Chumphon, do you need any additional documents for proof of address or any other?
Thank you for in advance...
TLDR : Answer Summary
To extend your stay from a visa exempt entry in Chumphon, it is advisable to bring additional documents for proof of address, such as a hotel receipt or business card if staying in a hotel. If residing at a private address, a printout of the TM30 report is recommended.