Joshua Browder, a 19-year-old British student at Stanford University, has created a chatbot (DoNotPay.co.uk) that successfully challenged parking tickets in London and New York City.

The chat interface asks a few basic questions and then auto-generates a legal appeal for a parking ticket (it can also make a claim for compensation regarding delayed flights). Alternatively, a simple Web form is available for those who don’t want to interact with an AI.

“When I started the website, it was because I got a few parking tickets myself,” Joshua Browder told Ars by phone. “Local governments aren’t issuing these tickets when people are doing something wrong—they’re doing it to raise revenue.”