funny to see how matters are handled in different immi offices. We went to a hotel in Udon Thani for 3 days recently and when we returned home I asked our immi if we should file a new tm30 ( I asked on the Line app) and the answer was yes!
you can as well use the official tm30 from immigration. They improved it a while ago and it is easy to do. The first time I used it after having applied for a userid and pw I had to supply copies of my wife's Thai id and housebook. The web site tells you that - no problems
I was asked by my Danish insurrance company that transfer my private pension to my Thai bank account for a Thai tin number. I got that from a local amphur. It was obviously the 1st time they did that