Easy question just want to confirm. During the 90-Day Non-Immigrant Visa based on Thai marriage can I leave the country? Or do I have to ask immigration for permission first? I want to go to Laos to explore for a week so want to cross by land. Goal is to convert it to multi entry visa.
TLDR : Answer Summary
Yes, you can leave Thailand on a 90-Day Non-Immigrant Visa based on Thai marriage, but you must purchase a re-entry permit before exiting the country. Make sure to return before your 90 days expire to apply for a year extension, after which you can convert to a multi-entry permit.