I am applying for an ED visa in Vientiane on August 1, 2018. I have a non-immigrant B visa which expires on July 31, 2018. I live in Chiang Mai. Do I need to notify Chiang Mai Immigration that my old visa is cancelled before I go to Vientiane to get my new visa? Is there anything I need to do regarding ending my old visa now, or later? THANK YOU.
TLDR : Answer Summary
The user inquired about the procedure for transitioning from a non-immigrant B visa to an ED visa while in Vientiane, specifically whether they must notify Chiang Mai Immigration of their visa change. A comment responded that if staying in Thailand on the initial visa, there is no need to cancel it beforehand. However, if the visa involves an extension of stay or work permit, those would need to be cancelled at the end of employment, which should be planned accordingly.