I am currently on a one year extension based on marriage to a Thai and in about 3 weeks I will apply for the same extension at Chiang Mai using a 400k baht security deposit as evidence of income. May I ask, please: have the requirements for documents to submit changed over the past year? (I live about 3 hours away from the city and have no plans to visit before I apply so I cannot check at the immigration office myself and they haven't answered their phone.)
The image shows the required documents list at Chiang Mai Immigration Office from November last year.