The FTC said these disclosures aren't sufficient.
The complaint pointed to more than 100 posts that violated the FTC's rules governing consumer-marketing disclosures by failing to state they were being compensated by the companies.
The consumer protection agency on Wednesday announced that it recently sent out more than 90 letters reminding Instagram stars and marketers that they need to "clearly and conspicuously disclose their relationships to brands when promoting or endorsing products through social media".
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The development comes in the wake of the death sentence awarded to Kulbhushan Jhadav in Pakistan on the charge of spying. Media reports in Pakistan said they were arrested for alleged involvement in anti-state activities.
However, this can become an issue on Instagram if the influencer writes a long post or buries a disclosure in a string of hashtags, according to the FTC statement explaining why it chose to send out the letters.
But it's not just Kardashians: also a year ago the FTC called out Warner Bros. for a social-media influencer campaign that didn't clearly disclose the fact that the influencers were being paid to promote its "Lord of the Rings" video game, "Middle Earth: Shadow of Mordor".
Instagram is one of the most powerful places to reach consumers, and celebrities often carefully curate their posts to portray a particular lifestyle.
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In September 2015, a rebel missile strike on a coalition base in Marib killed 67 coalition soldiers, a lot of them Emiratis. Washington alleges that Iran, Saudi Arabia's regional rival, has shipped missiles to Yemen but Tehran denies the charge.
The publication alleged that her sisters sisters Khloe, 32, and Kourtney, 37, can rack up $250,000 for sharing branded snaps with their 64million and 54million followers, respectively.
In 2015, Kim Kardashian and drugmaker Duchesnay ran afoul of the FTC and FDA for failing to disclose that the social media star was being paid to promote Diclegis, a morning sickness drug.
The action comes after Michael Ostheimer, of the FTC's Ad Practices division last August warned that the agency may start cracking down on celebrities for deceptive endorsements.
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We're beginning to learn just how good this kid is at finishing them, even at the end of high-pressure postseason games. He now leads the league with four postseason goals - one more than the Wild have managed in three games against the St.
For example, simply saying "thank you" to a brand or adding '#sp" or '#spon' probably isn't clear enough, while saying a brand is a "partner' probably is, she said.