The U.S. Court of Appeals for the Ninth Circuit recently affirmed former Meta advertisers’ certification of a class action complaint against the social media giant’s self-service advertising campaign that allegedly misrepresented the potential reach of accounts.

The divided panel affirmed an order from Presiding U.S. District Judge James Donato of the Northern District of California, certifying the “damages class” of advertisers who claim that Meta misrepresented the “potential reach” of advertisements on its platforms—despite the parties’ disagreements to the size of this discrepancy. The advertisers allege that Meta’s potential reach was an estimate of people, but it was really an estimate of accounts, which could include duplicate or fake accounts, according to the March 21 majority opinion.