How can a landlord fill out the TM30 form if they are not in Thailand?

If the landlord is not in Thailand, they can fill out the TM30 form online in some cases, or the tenant can self-report at immigration provided they have the necessary documents, such as a signed copy of the landlord's ID card and tabian baan (house registration). In Bangkok, tenants may even self-file without needing input from their landlord, only requiring the lease and other necessary paperwork.