What documents are required for a 60-day marriage visa extension in Thailand?

A user shares their experience of obtaining a 60-day visa extension based on marriage at the Sri Racha Immigration Office. They report a relatively quiet visit with only four people in line. They mention that along with the usual documents, it is crucial to present the TM30 form as proof of residence in the province and the Kor Ror 2 form from a district office, which may not be required at all immigration offices. They also remind applicants to bring their Kor Ror 3 marriage certificate.