A cultura e o software defeituoso dos Correios levaram a uma acusação injusta de mais de 900 subpostmasters. Inquiry finds Post Office's culture and faulty software led to wrongful prosecution of over 900 subpostmasters.

O Inquérito de TI do Post Office Horizon concluiu que a "cultura maligna" e o "desejo de controle absoluto" dos Correios foram as principais causas da acusação de mais de 900 subpostmasters entre 1999 e 2015. The Post Office Horizon IT Inquiry concluded that the Post Office's "malignant culture" and "desire for absolute control" were the primary causes of the prosecution of over 900 subpostmasters between 1999 and 2015. O software de contabilidade Faulty Horizon levou ao aparecimento de dinheiro perdido nas contas dos subpostmasters. Faulty Horizon accounting software led to the appearance of missing money in subpostmasters' accounts. Apesar do governo oferecer compensação àqueles com condenações anuladas, muitos ainda estão aguardando pagamentos. Despite the government offering compensation to those with quashed convictions, many are still awaiting payouts.