A new phone app is offering money to people willing to become amateur parking wardens.
The private car park enforcement firm CPM is offering £10 to users who submit a photo of a car and its number plate that is parked on private property through its i-Ticket app.
The drivers will then be fined £60, which increases to £100 if it is not paid within two weeks.
The app has been branded a "recipe for disaster" by the RAC.
"This is wrong on so many levels it beggars belief," the breakdown firm's Simon Williams told the Mirror.
"The sharp practices of parking companies are already regularly called into question with paid officials dishing out fines, but with members of the public being financially encouraged to shop motorists who overstay, it’s a recipe for disaster.
The app is designed for small businesses to manage cars parking on their land. Once users download the app and create an account they are sent car park signs to display.
The company promises "complete privacy" to users who report drivers.
"Our parking tickets and signs have no reference to yourself, all correspondence are designed to make the motorist believe they have been caught by a CPM patrol warden," it says on its website.