A familiar face appears in your feed, speaking directly to the camera. They recommend a skincare product, praise an investment opportunity, or announce a limited-time giveaway. The video looks convincing, the voice sounds right, and the post appears in a polished advertisement. But the influencer may never have said a word about it.
Deepfake technology can imitate a person’s face and voice, turning their identity into a sales pitch without their permission. For viewers, the result can be a scam or a bad purchase. For influencers and brands, it can trigger a deeper problem: people may begin to doubt what they see, who they trust, and whether any endorsement is real.
A familiar face can make a false ad feel credible
Influencer marketing works because people often feel they know the person behind the post. Followers watch their videos, hear their opinions, and may rely on their recommendations when choosing products. A fake ad borrows that relationship to make a message seem more believable.
Scammers can use a creator’s public videos to produce false endorsements, then distribute them through paid social media ads or reposted clips. In 2024, the U.S. Federal Trade Commission warned that scammers were using doctored video and audio to make celebrities and influencers appear to endorse products. Its advice to consumers was simple: check whether the person or company has confirmed the promotion through an official channel.
The danger is not limited to famous people. A creator with a smaller but devoted audience can also be impersonated. And while some fakes promote harmless products, others steer viewers toward counterfeit goods, phishing pages, or fraudulent investment schemes.
When a fake endorsement damages a real reputation
The person shown in a deepfake may be its first victim. Followers may accuse them of promoting a questionable product or misleading their audience. Even after the clip is exposed, screenshots and reposts can keep circulating. The influencer then has to spend time correcting the record and rebuilding confidence.
Brands can be caught in the fallout even when they had nothing to do with the ad. If a fake video claims that a company is selling or endorsing a product, viewers may blame the brand for poor security or assume it was involved. If the advertised product causes harm or takes people’s money, anger can spread to anyone whose name appeared in the promotion.
Research points to a particular risk: authenticity. In five experiments involving 1,903 participants, researchers at Northwestern University’s Kellogg School of Management found that people responded less favorably to both brands and celebrities shown in deepfake advertisements. The researchers linked this reaction to lower perceptions of brand authenticity.
That finding matters because audiences don’t always separate the fake video from the real people in it. Once an ad makes viewers feel manipulated, the brand and influencer may both lose credibility.
The cost of doubt reaches beyond one campaign
Deepfake ads can create a wider trust problem. When convincing fakes become common, viewers may start questioning genuine endorsements too. Influencers may have to prove that real promotions are real, while brands face skepticism toward campaigns they’ve carefully planned and paid for.
That uncertainty can weaken the value of influencer marketing. A recommendation is useful only if people believe it reflects a genuine opinion or a legitimate partnership. When audiences can’t tell a real endorsement from a fabricated one, even honest creators may find that their words carry less weight.
There is also a practical burden. Influencers may need to monitor platforms for impersonations, alert followers, and report fraudulent ads. Brands may need to check whether their names, logos, or products are being used in fake promotions. Platforms must identify and remove deceptive content, often while scammers change accounts and repost material.
Prevention starts before a fake appears
Brands and creators can reduce confusion by agreeing on a response plan before a crisis. They should decide who will monitor for impersonations, who will report suspicious ads, and which verified channels will carry updates. If a fake appears, a prompt, clear statement can help viewers understand that it is unauthorised and where to find genuine information.
Influencers can also remind followers that paid partnerships will be disclosed on their official accounts. Brands should make product and promotion details easy to verify on their own websites and social channels. These steps won’t stop every fake, but they give viewers a reliable place to check before they click or buy.
For consumers, a few habits help. Look at the account that posted the ad, check the influencer’s verified channels, and search the brand’s official site for the offer. Be wary of urgent countdowns, unusually generous giveaways, or investment claims attached to a familiar face. If something seems suspicious, avoid sharing personal or payment details until you can confirm it.
Advertising rules also matter. In the United States, the FTC’s endorsement guidance covers advertising that uses influencers and social media, and the agency advises that endorsements should not mislead people about who is speaking or what they have experienced. Specific legal requirements vary by country, so brands and creators should follow the rules that apply where their campaigns run.
Trust is harder to rebuild than a campaign
Deepfake technology makes it easier to manufacture an endorsement, but it cannot manufacture the trust that gives a real recommendation its value. A convincing fake can cause immediate harm, then leave influencers, brands, and audiences questioning what they see long after the ad disappears.
The strongest response combines faster reporting, clear communication, and easy ways to verify genuine promotions. Brands and creators can prepare for impersonation, and viewers can pause before acting on a surprising endorsement. Protecting trust will take work from all sides—but that trust is what makes influencer marketing matter in the first place.