I’ve just left the Vientiane Thai embassy to apply for a single entry Non O based on marriage. They asked to see my ORIGINAL marriage certificate. Fortunately I had it on me but a guy I met in my hotel last night wasn’t so lucky and was having to arrange someone to bring it to him today. There is no mention on their website about requiring to see the original. And they also handed me back my bank statement so I assume they don’t need proof of funds 🤔