Fiona Watson was investigated after the Horizon computer system miscalculated her accounts.
She was made to feel the only way of avoiding jail would be to plead guilty.
During the investigation the mum-of-two was diagnosed with cancer and died months later.
In another case, Seema Misra from West Byfleet was sent to jail in 2010 when she was 8 weeks pregnant and gave birth while on a tag.
Fiona’s daughter Katie wants justice for her mum.
