Quote Originally Posted by marciofs View Post
My question is: Do I have to collect release from models In Germany in order to sell my prints?
No. But since the models can sue you it's better to have one.

Quote Originally Posted by marciofs View Post
Buyer or even the government ask for it?
Probably not. Maybe a judge...

Quote Originally Posted by marciofs View Post
Can models' sue me eventually for selling prints without release?
Yes.

Look up the german "Kunsturhebergesetz" (http://de.wikipedia.org/wiki/Recht_am_eigenen_Bild).