Hi guys...i was born in Bangkok and i have my original birth certificate in thai+ old passport (expired in 15/2/1983)....in 1978 i moved to germany and my stepfather (my mom is thai) adopted me, so i‘m a german passport holder...my father told me that we have used my thai passport for traveling until we let it expire, then changed to german passport....can it be that i‘m still a thai citizen?
TLDR : Answer Summary
The user was born in Bangkok and has an original Thai birth certificate along with an expired Thai passport from 1983. After moving to Germany in 1978 and being adopted by their stepfather, the user obtained a German passport. They are inquiring if they may still hold Thai citizenship despite holding a German passport and their Thai passport being expired.