Warning Services, and TeleCheck track how people manage their checking accounts. Banks use the agencies to screen checking account applicants. Those with low debit scores are denied checking accounts because a bank can not afford an account to be overdrawn. Overdraft protection Overdraft protection is a credit service offered by banking institutions primarily in the United States. Overdraft or courtesy pay program protection pays items presented to a customer's account when sufficient funds are not present to cover the amount of the withdrawal. Overdraft protection can cover ATM withdrawals, purchases made with a debit card, electronic transfers, and checks. In the case of non-preauthorized items such as cheques, or ACH withdrawals, overdraft protection allows for these items to be paid as opposed to being returned unpaid, or bouncing. However, ATM withdrawals and purchases made with a debit or check card are considered preauthorized and must be paid by the bank when presented, even if this causes an overdraft. Ad hoc coverage Traditionally, the manager of a bank would look at the bank's list of overdrafts each day. If the manager saw that a favored customer had incurred an overdraft, they had the discretion to pay the overdraft for the customer. Banks traditionally did not charge for this ad hoc coverage. However, it was fully discretionary, and so could not be depended on. With the advent of large-scale interstate branch banking, traditional ad hoc coverage has practically disappeared. The one exception to this is so-called "force pay" lists. At the beginning of each business day, branch managers often still get a computerized list of items that are pending rejection, only for accounts held in their specific branch, city or state. Generally, if a customer is able to come into the branch with cash or make a transfer to cover the amount of the item pending rejection, the manager can "force pay" the item. In addition, if there are extenuating circumstances or the item in question is from an account held by a regular customer, the manager may take a risk by paying the item, but this is increasingly uncommon. Banks have a cut-off time when this action must take place by, as after that time, the item automatically switches from "pending rejection" to "rejected", and no further action may be taken. Overdraft lines of credit This form of overdraft protection is a contractual relationship in which the bank promises to pay