Anyone who offers accommodation needs to comply with the law by reporting any foreign national staying on the property. The report must be completed not only by hotels and serviced apartments but also by landlords of private properties.
It is the landlord’s responsibility to submit the TM30, but if the landlord doesn't then the guest should raise the issue, as it is a legal requirement.
If the landlord fails to file the report, they are subject to a fine of between 800 and 2,000 THB
Reporting by mail is slightly different than reporting in-person. You will need to send your documents in at least 15 days before your reporting due date.
You will be required to mail in signed photocopies of the following documents:
Passport info page (with photo, name, passport number, etc.)
Current visa
Latest entry stamp
Latest visa extension
Departure card (TM6) If you have one
Previous 90-day slip (if you have it)
Completed notification form (TM47) – address reporting form
These need to be submitted together with a stamp (10 Baht) addressed envelope with your home address written on the face of the envelope. The envelope is required for immigration to send back the bottom section of your TM47, which will tell you when your next reporting date is.