A consumer advocacy group is urging US regulators to investigate Amazon over undisclosed influencer endorsements during Prime Day this year.

Washington DC-based group Public Citizen said that in a "great number of cases," influencers did not let people know they were getting commission for their endorsements.

Federal Trade Commission guidelines suggest that companies should monitor influencers who are endorsing products on their behalf and "deal" with those not being transparent.

Visit Business Insider's homepage for more stories.

A consumer advocacy group is asking US regulators to investigate Amazon, alleging that some of its influencers did no correctly disclose that they were being paid for endorsing Prime Day deals.

Washington DC-based group Public Citizen said in a letter to the Federal Trade Commission this week that "in a great number of cases" the endorsement relationship was not communicated to customers.

The text above is a summary, you can read full article here.