If you find yourself in Chanthaburi in Thailand and you need to extend your Thai visa then you can ask at Thai Immigration in Chanthaburi. They can extend a marriage visa for Thailand, retirement visa for Thailand or a tourist visa. Note that you can also report your 90 day stay if you live in the area. We have listed their contact details below.
The border can be very busy being the Chanthaburi border crossing into Cambodia so it is best to go early if you are doing a visa run. The Thai immigration office is not far from the border itself being the Ban Pakkad immigration office or Chanthaburi immigration.
Thai Immigration in Chanthaburi
Moo 1 Amphoe Pong Nam Ron
Fax: 0-3938-7127 ext.18
Email : email@example.com & firstname.lastname@example.org