What documents are needed for a 90-day check-in in Chiang Mai?

For a recent 90-day check-in in Chiang Mai, various expats reported differing requirements. Commonly required documents included a passport, previous 90-day report slip, and potentially a filled-out TM-47 form. Some noted that staff may take additional details like residence GPS coordinates, while others experienced a straightforward process at drive-through locations, suggesting that requirements can vary.