The Association of National Advertisers officially released its report that says that ad agencies get rebates from media companies that their clients are unaware of. The big companies that own the major media buying agencies questioned the report because it doesn’t name the agencies that receive rebates.

According to the 58-page report from the ANA, working in conjunction with K2 Intelligence, there was a difference in the view of the business relationship between agencies and their clients, with advertisers expressing a belief that their agencies were duty-bound to act in their best interest. Meanwhile, many agency executives interviewed said their relationship to advertisers was solely defined by the contract between the two parties, according to the ANA.

Read the full Broadcast Cable article here.