Asking for a friend. He wants to go get a non-B visa on a second passport. The problem is, will they require to see his exit stamp when he tries to get into Laos? Essentially he wants switch passports and use his second for the non-B once he leaves Thailand. He has 2 British passports. (I already know this isn’t possible by land) Any help welcomed.
TLDR : Answer Summary
A user inquired about whether a person with two British passports could switch between them to obtain a non-B visa for Thailand upon exiting to Laos. It's generally accepted that one can use the passport with a valid stay to exit Thailand and then use the other passport to enter Laos and apply for the visa at the Thai Consulate. However, caution is advised to ensure all documents for the visa application reflect the passport being used for the application.