I just arrived in CM by train from Bangkok. Registered in CM-CHANA prior to departure.
Upon arrival everyone was asked to register in CM-CHANA and was funneled to a desk for identity checks. Most people were told to undergo a COVID swab test and wait 20 minutes for the result.
When it was my turn, the official asked for my mobile number, checked a list, found the number, put a pink sticker on me and told me that I can leave. I was very confused why I wasn't subjected to the test. I have no clue why, but I was somehow already in the system. But I was never tested before. I'm officially registered in BKK, but I provided an address of a private residence (no hotel) in CM.