Ellen DeGeneres and Sandra Bullock want to put a stop to fake celebrity endorsements.

DeGeneres and Bullock teamed up to file a joint lawsuit in Los Angeles Superior Court on Wednesday, on Wednesday, per The Hollywood Reporter, suing 100 anonymous individuals and entities.

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They are “joining forces in this action to expose the Celebrity Endorsement Theft Industry,” according to the lawsuit, which details how the pair are targeting those who use fake celebrity endorsements for affiliate marketing in order to earn commissions by directing traffic to e-commerce sites.

The lawsuit estimates it is a multi-billion industry, with major names including Amazon and Hulu depending on affiliates for sales.

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The complaint uses “actual examples taken from the Internet” in which the defendants’ websites are “designed to look like legitimate and independent news reports or magazine articles about various Beauty products.”

The “publications on the fake media sites feature comments and endorsements purportedly from Bullock and DeGeneres — all of which are fake and fraudulent and published without Plaintiffs’ consent,” the lawsuit concludes.