Post Office scandal reveals a hidden world of outsourced IT the government trusts but does not understand shawnwil23/Shutterstock Friday, April 30, 2021 7:40 AM UTC The convictions of 39 Post Office workers were quashed on April 23 after the UK’s court of appeal heard that the crimes for which they’d been accused were in fact caused by the organisation’s Horizon IT system. The system, supplied by Japanese IT services provider Fujitsu, had erroneously registered cash shortfalls in Post Office branches, leading to hundreds of convictions of theft, fraud and false accounting between 2000 and 2014. The scandal is one of the biggest miscarriages of justice in British history.