The 78-year-old woman had been the subject of a two-year investigation by the Windsor detachment of the RCMP.
Police say the investigation revealed she had been fraudulently collecting Old Age Security and Canada Pension Plan payments for approximately 14 years.
As a result, she was charged with three counts of fraud over $5,000 and three counts of uttering forged documents. All but one of those charges were dropped when the woman pleaded guilty to one count of fraud, for which she received a 12-month conditional sentence and 12 months of probation.
She must also pay $151,310 in restitution to the Receiver General of Canada.
Police have not released the woman's name.