I think its a "residence certifate" I have ti get my father in law to fill mine in every year, plus a copy of his id. I don't pay rent. I don't think its a rental agreement. Try and translate the title with Goole translate.
I done it 3 times here my list: TM 7 Application x 2 both must be originals
Photos (4 x 6 cm) on both application forms.
Copy of passport, main page, plus copies of old extensions, TM 6 arrival / departure card. TM30 and latest 90 day report
Copy of marriage certificate.
Updated copy of Kor Ror 2 (long tabien) from Amphur office.
Copy of house registration (blue book / tabien baan).
Copy of wifes ID card.
Bank book to prove 400,000 Baht in bank for at least 2 months before. In Prachinburi they also require you to keep the money for 3 months after. The bank book should be updated on the same date of the application. (I move 100THB in and out of the account on the day of the application or else it will be out of date)
A bank letter that should be dated on the day you submit your application, your bank should know what’s required but the letter should include: Your name, Passport number, bank account number and the balance
The bank letter should have the same balance as the bank book
Map location of house, hand drawn, I also give a printed Google map
They will call you to visit your home and may require a witness.
Photo's of marriage: In Prachinburi they want 4 photos of you have your wife: One outside the house showing the address, one in the bedroom, one in the kitchen and one the lounge
There is a Thai form: that will need to be filled to say you understand your be deported if you don’t comply with the visa
in Prachinburi you have to have 3 months after renewal, (ThaiWife) I know its not correct but its there rule, my point was more about it dropping below the required level where it was ok, seen as a mistake quickly put right.