This form of overdraft protection is a contractual relationship in which the bank promises to pay overdrafts up to a certain dollar limit. A consumer who wants an overdraft line of credit must complete and sign an application, after which the bank checks the consumer's credit and approves or denies the application. These lines of credit are loans and must comply with the Truth in Lending Act. As with linked accounts, banks typically charge a nominal fee per overdraft, and also charge interest on the outstanding balance. Some banks charge a small monthly fee regardless of whether the line of credit is used. This form of overdraft protection is available to consumers who meet the creditworthiness criteria established by the bank for such accounts. Once the line of credit is established, the available credit may be visible as part of the customer's available balance.