The Portland Press Herald reports that Christine Royles of Maine was diagnosed with an autoimmune disease which led to kidney failure in December 2013.
She went on the national waiting list to find a donor, but decided to take matters into her own hands.
Josh Dall-Leighton, a 30-year-old a father of three, saw the message on Royles' car window, which included a phone number. He called.
The stranger has been classified as a potential match and the surgery is set for May. Royles calls Josh's generosity "unbelievable.
