A Corning woman has joined her co-defendants in pleading guilty in a sophisticated scam targeting credit card companies that was carried out from hotels and motels throughout Northern California. 26-year-old Sabrina Raylene Toilolo, her sister Talalima, and Monica Nunes exploited the refund process used by businesses and retail stores to pay back customers for returns, reimbursements and erroneous charges. They apparently did it by stealing the actual point-of-sale terminals from checkout counters and reprogramming them to make merchants banks transfer refunds to the defendants’ accounts. The reported losses were more than 3.5 Million Dollars. Sabrina could be sentenced to 20 years in federal prison. Her sister has already been given a 12-and-a-half year sentence, and Nunes got 10 years. Another defendant has not yet made a plea.