If entering on a Visa Exempt, is it possible to change that to 1 year marraige extension?

You can apply for a non-o visa and then during the last 30 days of the 90 stay the non-o allows you could then apply for a one year extension of stay based upon marriage at immigration.

2 minutes ago, ubonjoe said:

You can apply for a non-o visa and then during the last 30 days of the 90 stay the non-o allows you could then apply for a one year extension of stay based upon marriage at immigration.

Apply for a Non O in Thailand when entering on VE?

 

Thx.

Yes

See: https://bangkok.immigration.go.th/wp-content/uploads/2020/10/6.pdf

thx