What paperwork is required to transfer a car's ownership to my name in Thailand?

Sounds like you know the current owner and the vehicle is already registered in your home province. Next step is to ask at your local LTO what documentation they require to transfer your name to blue book. My LTO obtain a certificate of residence from IO for me.

It depends on where the vehicle is registered.

If it is not in the same province that you wish to register in, it must first have a new number and be registered in your home province.

It requires a power of attorney and a transfer document from the previous owner, as well as a copy of the previous owner's ID or passport.

If you do not have a pink farang ID card, proof of residence is also required from you, as well as a copy of your passport.

You will then turn up to pick up a new number plate and inspect the vehicle, after which your name will be added as the new owner in the registration book.

Same deal as getting driving license immigration certificate stating residency with attached photo

Original book

POA of current owner (if not with you)

ID of current owner

Passport/visa copies

Resident certificate

Transfer form (I think there is 2)

A yellow book

Passport and residency certificate from Immigration

Varies by office

Copy passport

copy Visa

residency certificate

2 forms from LTO and same from seller