How do I obtain the TM30 if I'm staying in a guesthouse in Thailand?

To obtain your TM30 while staying in a guesthouse in Thailand, the guesthouse owner is responsible for registering you and providing a receipt as proof of this registration. You should ask the guesthouse for a printout or a copy of their TM30 registration, as many immigration offices require a hard copy of this receipt, not just a digital record. If you are staying with a Thai family, they also need to register you at the local immigration office. The registration process and required documents may vary by immigration office.