The Met Police say they are investigating possible fraud offences linked to fraud prosecutions against hundreds of Post Office staff.
They are checking the money that the Post Office clawed back from the sub-post managers through civil actions.
For those who came in late, hundreds of sub-posties were wrongly convicted of nicking cash from their branches after a dodgy Horizon IT system supplied by Japanese tech giant Fujitsu made them look guilty. To make matters worse, the Royal Mail knew its system was spitting out false data and covered it up.
Bosses who ignored the problems with the software made the workers pay back the shortfalls. Some ended up in jail or out of pocket, while others lost their jobs and homes.