Sorry if this has been posted before but
I went to Immigration for a 30 day extension of my multi entry tourist visa the other day and got pinged 800 bht (400 bht per month) for not registering the GF's address within one week of arrival.
If you stay at hotels etc the onus is on them.
I knew there was some sort of a regulation about that but it's never come up before in any of my previous trips.
Another crack-down?