"In addition, the Guides say, if there’s a connection between an endorser and the marketer that consumers would not expect and it would affect how consumers evaluate the endorsement, that connection should be disclosed. For example, if an ad features an endorser who’s a relative or employee of the marketer, the ad is misleading unless the connection is made clear. The same is usually true if the endorser has been paid or given something of value to tout the product. The reason is obvious: Knowing about the connection is important information for anyone evaluating the endorsement."

https://www.ftc.gov/tips-advice/business-center/guidance/ftc...