A lawsuit has been filed against Amazon, alleging the company deceived businesses. The claim is that advertisers were overcharged, with 1.2 million paying more than expected. This is due to Amazon raising ad prices without notifying them.

The lawsuit is the result of a joint effort by the Federal Trade Commission and 22 states. It marks the third major lawsuit against Amazon by the federal agency.

Further details about the lawsuit and Amazon's advertising practices are available, including the company's use of an auction system to set ad prices.