I also have assets both in Thailand and in an EU country. Will the EU country be content to leave my Thai assets alone, ie to be taxed with inheritance tax in Thailand, then distributed to my heirs in Thailand ? I suspect not. The EU country will want to lump all my assets (EU + Thai) and levy an inheritance tax on the whole. And this will probably lead to an international legal mess ending up in all my assets being frozen for years. I've seen it happen between two neighbouring EU countries, it should be much worse when an exotic country is involved.