Reporting a positive experience of doing a 12 month extension (based on being over 50) at Chiang Mai Immigration yesterday. Arrived around 8.15am, finished by 10.45am. Less than 5 minutes wait in the queue for a ticket. Plenty of empty seats in the waiting area. Some visa agents there but with the customer ie did not see any of them carrying multiple passports/paperwork. I used a statutory declaration (notarized letter) re receiving 65K a month into my overseas bank account. I got this from the Australian Embassy about a month before they stopped issuing them, thanks to the advice in this group to do that. I wasn't asked for proof of funds, although I had brought that with me. The stat dec alone was enough. Not sure if I was just lucky that I had an Immigration staff member that was in a good mood, or if Chiang Mai Immigration have become more lenient and have stopped asking for multiple proofs of the foreigners overseas income. A very much improved experience, whatever
TLDR : Answer Summary
A user reported a smooth experience extending their visa for 12 months at Chiang Mai Immigration, arriving at 8:15 am and finishing by 10:45 am with minimal wait and no need for additional proof of income. They utilized a notarized statutory declaration obtained from the Australian Embassy, which was sufficient for the application, suggesting potential leniency in immigration requirements.