If a Lao passport holder, living in Thailand on an annual Extension as a dependent, needs a new Lao passport can they do this at the Lao Embassy in Bangkok or do they have to go back to Laos to do it?
TLDR : Answer Summary
A Lao passport holder living in Thailand on an annual Extension as a dependent generally needs to return to Laos to apply for a new passport, as previous commenters indicated. While some suggested contacting the Lao embassy for confirmation, the common understanding is that passport services for Lao citizens require visiting Laos.