While the use of credit cards has exploded over the last years and many people carry plastic, many people still also use checks. If your business does not accept checks, both online and off, you could be losing money to your competitors who do. When shopping online, people will abandon their shopping cart if they reach the checkout and cannot use their preferred payment method. When shopping offline, people expect to be able to write a check so they can use the money in their bank account. If you cannot accommodate them, they may walk away.