The Better Business Bureau is sending out a warning to consumers involving “free trial” offers. Many of the offers use celebrities (without their knowledge) to promote their products. "We are talking celebrities like Oprah Winfrey, Tyler Perry and Tim Allen," says Dottie Callina with the Atlanta area Better Business Bureau.

Once you sign up you are locked in for monthly payments, until you take additional steps to stop the deliveries.

Millions of people have been victims of the "free trial" offer scams, according to BBB.

Between 2015 and 2017 complaints to the FBI about “free trial” offers have more than doubled.

"I've seen a lot of it for makeup and diet products, “says Callina.

She says to avoid falling victim there are a few things to look for to spot a deceptive online ad, a surprising celebrity endorsement, extravagant claims about the product, a website with no contact information or the subscription information hidden in the fine print.

If you feel you have been a victim, you can contact the Atlanta area Better Business Bureau.