Step 1, visit the Immigration Office and fill in the TM30 address registration form, provide the asked copies. You will get a note from the Immigration Office that your address is registered.

2. your passport, your older 90 day report if you have done before and the note from address registration.

@Robert *********

Than visit the main office in Phuket town.

That all depends on where you are inside Thailand. Not every Immigration Offices is allowed to perform a conversion from a visa exempt entry into a Non Immigrant O visa.

Best is to directly contact your local Immigration Office, is needed anyway to register your address, and ask for the hand out of requirements if they can do this conversion.

@Paul ********

Leave on the 18th or visit Immigration and apply for an Extension of Stay if he is legit for any extension.

Standard documents:

copy id page passport

copy visa page passport

copy latest Admitted until, permitted up to stamp

copy marriage certificate

copy kor ror 2

copy ID of wife

copy housebook wife

copy bankbook

bank letter if used banked money 400.000 Thb OR Income Affidavit from Embassy OR 3 months paying tax/sso in Thailand when work in Thailand OR if embassy do not provide the affidavit 12 months prior application each and every month a deposit of minimum 40.000 thb into a Thai bank account on your name with bank letter

Picture of both of you outside house with house number

Picture of both of you inside the house

copy address registration>

Items might be added by people living and applied for the same Extension in Chang Mai.

@Graham *****

I look at the stamp as the stamp is correct, not the use of a calculator.

@Eric ******

Okay, please edit or remove the picture as I see now your passport number can be read.

I focussed first on the stamp, sorry for that.

@Paul ********

The stamp that an application is denied has not affect on future travel to Thailand.

@Ryan *******

You need an insurance to use the visa and all extensions after based on this visa during the complete period.

You can apply, worst case scenario is that the application get not approved and you get 7 days to pack your bags and leave the country