The Entrust Pro brand was the first Zurety product, and continues to be a top seller, bolstered by excellent customer ratings and a high volume of repeat business. These pens—most often sold in packs of 5—quickly detect counterfeit money in currency from the U.S. and many other countries. They are a must-have for retailers and service providers who are paid in cash. Users also take them to the bank to verify cash withdrawals, since banks are not required to replace fraudulent bills once accepted.