Equity Card
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For the credit card secured by home equity, see HELOC.
An Equity Card is proof of membership in Actors' Equity Association, an organization of stage actors. For some exclusive clubs catering to show-business types, the card can be used to prove that they are indeed the actor and not some look-alike imposter.
According to the BBC website, the children who sang on Pink Floyd's number one hit "Another Brick in the Wall (Part 2)" couldn't appear in the video because they didn't hold Equity cards [1].

