City of Westminster penalty charge notice or PCN on the windscreen of a car on 23rd July 2022 in London, United Kingdom. Penalty charge notices or fixed penalty notices or FPNs are parking tickets which were introduced in Britain in the 1950s to deal with minor parking offences. Originally used by police and traffic wardens, their use has extended to other public officials and authorities, as has the range of offences for which they can be used.