Are TM30 forms linked by passport number or name, and do I need to submit a new TM30 after staying in a hotel?

The TM30 forms are linked by passport number, but you can use your Thai driver's license, which contains your passport number, for filing. After a hotel stay, it is typically required to submit a new TM30, but requirements can vary by immigration office. For long-term visa holders, brief stays may not necessitate a new form, but some provinces, like Maha Sarakham, may only require updates for international travel or permanent moves.