Alice Lewis bought her ticket from a vending machine situated inside Fry's Foodstore on Baseline Road in Phoenix and got busy scratching as soon as she returned to her car.
As the winning numbers were revealed Lewis thought she had won $1,000. When she realized how wrong she was she rushed back to the store and had the clerk double check the ticket.
When asked about her plans for the money Lewis told Arizona Lottery officials she intends to invest it ready for her retirement next year.
The Million Dollar Cash Bonanza game was introduced on March 19, 2013. The top prize is $1 million. Winners can choose to take their prize in annuity payments of $50,000 for 20 years or take a one off lump-sum payment of 650,000. Only one $1 million prize remains to be claimed.