I never really understood IAOPA. As I am a member of AOPA US, does this mean I am a member of IAOPA?
In this case it's IAOPA Europe, which is the European AOPA's working together.
Being a member of AOPA US does diddly squat for anything in Europe. Bizarrely some people think it does.
IAOPA and IAOPA Europe are there to represent national AOPA's in the case of IAOPA Europe to the EU and its aviation organisations like EASA, in the case of IAOPA to ICAO, on which it has a representative.
It's a bit like the BGA where you are a member of a Gliding CLub, which is affilliated to the BGA. That doesn't make you a member of BGA.