Can I report my stay to a police station for TM30 notification or must I go to Immigration?

When staying in Thailand on a TR visa, you are required to notify Immigration within 24 hours of your residence address. Typically, this notification is done at the Immigration office; however, in some provinces, it can be reported at local police stations. Since you are renting a condo and your lease is in your girlfriend's name, she, as the house master, is responsible for registering the TM30 report online within the same timeframe. It's important that she provides the correct address code during this process. For convenience, registration can be done online at the immigration website.