I have a CoR for a car sale/purchase dated 9 March. Is there an expiry date for this certificate for the Land Transport Office?

A CoR from Thai Immigration is valid for 30 days.
A CoR from your embassy is valid for six months.

Easy read guide here for those interested in COR.

https://www.thethailandlife.com/residence-certificate-thailand

 

Validity of COR from immigration typically has validity of a month however can depend on the transport office. Can be up to 3 months (not common) 

Note you require a separate COR for each use. 

The exception is that if obtaining a bike and car license at same time (or renewal) then one COR and photocopy will suffice. 

On 4/9/2025 at 4:35 AM, DrJack54 said:

validity of a month however can depend on the transport office

Chonburi DLT allowed maximum 30 days.  My CoR was 5 weeks old and was refused. This was for driving license.

BTW: Same 30 day limit also applies to the medical certificate.

PHUKET
driving license
COR 30 days

but medical is good for 6 months 

Helpful responses thank you. I am trading in one car for another so i will prepare two CoRs issued within 30 days.

you only need cor to BUY a car/motorcycle
one is not needed to sell

38 minutes ago, zzzzz said:

you only need cor to BUY a car/motorcycle
one is not needed to sell

Correct: here is cut paste from expert Thai visa days.....

 

"As the seller you should only need the vehicles log book and your passport.

You only need a certificate of residence if your the buyer as a foreigner unless you have a Yellow Tabien Baan.

The Thai buyer only needs his Tabien Baan and ID card."