a paid-up member, etc.
paid-up member (of something)
A certified member of a particular group or organization; someone who has paid the dues necessary to be part of a group. I never knew until he was on his deathbed that my father was a paid-up member of the Freemasons. I'm afraid only paid-up members of the union can be given any regular shifts on the docks.
See also: member
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
a (fully) ˌpaid-up ˈmember, etc.
1 a person who has paid the money necessary to become a member of a group, etc: The society has got over 10 000 paid-up members.
2 (informal) a strong and enthusiastic supporter of a group, etc: He is a fully paid-up supporter of the Green Party.
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