What documents are required to extend my non-O visa based on marriage in Thailand?

To extend a non-O visa based on marriage in Thailand, the required documents can vary by immigration office. However, a comprehensive list that may be requested includes: 1) copies of your passport and all visa pages, 2) copies of your spouse's ID and household registration (Kor Ror 2), 3) a letter proving your relationship (Ror 2) and marriage, 4) a bank statement showing a minimum balance of 400,000 THB (for at least two months), 5) a letter from the bank confirming your account balance, 6) proof of income or pension, 7) recent photos of your home (including living spaces), 8) a letter addressing your financial status, 9) witness documents, and 10) possibly additional documents specified by your local immigration office. It's advised to make copies of all documents and check with your specific immigration office for any unique requirements.