It's cracking down on bogus service pets.

The Publix grocery chain has posted signs noting that service animals are not allowed to ride in shopping carts, the Orlando Sentinel reports.

The signs, which are posted at entrances and exits, are a reminder of an existing policy, a spokesman told the newspaper. They note that "only service animals that are specifically trained to aid a person with disabilities are permitted within the store."

"Service pets are not permitted to sit or ride in shopping carts," the signs read.

The Associated Press reports that with the signs, Public is cracking down on the trend of people passing off their pets as "service animals" in order to take them places where pets are prohibited.

Airlines, in particular, have been dealing with the issue. In response, Airlines for America, a lobbying group for several airlines, has requested that the federal government ban all emotional support animals except dogs from flights. And in May, American Airlines said it would no longer allow certain animals, including insects, hedgehogs and goats, under its emotional support animal policy.

Read more at the Orlando Sentinel