After a customer took Publix to court last year, saying she’d been overcharged during a trip to the Florida-native grocery giant, News4JAX sister station WKMG in Orlando decided to look into an important policy the grocer offers: the Publix Promise.

A letter. An email. A message promising money. Millions of Americans receive class action settlement notices every year. It sounds great until you start wondering, is this legit? And it’s a question you should definitely be asking because real class action settlements do exist, but so do scams designed to look like them.