3P-CP
third-party content-provider
(“3P-CP” is shorter and more fun to say and thus is more common on this website)

A “third-party content-provider” is

any entity that puts photographs before the public and over which the photographer does not have full control of content.

(The photographer is the “first” party; the viewer is the “second.”)

Examples of 3P-CPs:

• publications over which the photographer does not have full control of content
• websites over which the photographer does not have full control of content
• photo-contest sponsors
• stock-photo agencies
• exhibitors
• camera clubs
• all other organizations and entities that meet the description in boldface above.

See the guide to Publishing TCQ Photographs for more, for example (in the answer to #2 on that linked page): “What are the options for a third-party content-provider when a clearly unqualified photograph is submitted with the ‘Guaranteed TCQ’ label?”