also paid up
1.
If a person or country is a paid-up member of a group, they are an enthusiastic member or are recognized by most people as being a member of it.
...our future as an independent nation lies as a fully paid-up member of Europe.
ADJ : ADJ n
2.
If someone is a paid-up member of a political party or other organization, they have paid the money needed to become an official member.
...a fully paid-up member of the Labour Party.
ADJ : ADJ n