How to protect personal assets in a Thai marriage?

Personal assets are in a Thai marriage basically protected by Thailand marriage laws. What you could do is make a prenuptial agreement, list your personal (separate) assets and maintain a form of (yearly) accounting of your personal assets and marital assets when married. When you want to protect properties in other countries you should verify the consequences of your marriage under the laws of that country and if you could chose which marriage property laws would apply on these assets with a local legal professional specialized in that area of (international) family laws.

See also

• Prenuptial agreement in Thailand
• Does my Thai wife own the house?
• Who gets what in a Thai divorce