A Practice Note discussing best practices to comply with the Federal Trade Commission's (FTC) guidance to avoid liability for influencer marketing in social media and to avoid reputational risks. This Note discusses the FTC's Endorsement Guides, including the obligations to disclose material connections clearly and conspicuously, to establish a social media endorsement policy, to train and monitor relevant parties, and to correct influencer failures. This Note also discusses tips to investigate influencer reputation and fraud.