Just got my OA visa renewed yesterday. Following are the complete set of documents that were required for swift processing :
(1)
(a) Letter from bank confirming latest deposit balance
(b) Bank Statement [bank issued last 3 months statement, signed & stamped] and;
(c) Passbook copy
[Bank charges total THB 200 for all the above]
(2) Copy of Health Insurance Certificate [From the insurer approved by Thailand immigration law. Immigration officer checked whether insurer was listed under their approved list or not]
(3) Photocopy of House/ Residence / Tenancy Contract
(4) Photocopy of Two selfies showing both myself and my house
(5) House location map drawn by me on plain paper
(6) Passport Copy (including old visa page)
(7) One color photograph
(8) OA renewal fee THB 1,900.