the account can be placed on hold by the bank. This may be due to Regulation CC (which governs the placement of holds on deposited checks) or due to individual bank policies. The funds may not be immediately available and lead to overdraft fees. Unexpected electronic withdrawals – At some point in the past the account holder may have authorized electronic withdrawals by a business. This could occur in good faith of both parties if the electronic withdrawal in question is made legally possible by terms of the contract, such as the initiation of a recurring service following a free trial period. The debit could also have been made as a result of a wage garnishment, an offset claim for a taxing agency or a credit account or overdraft with another account with the same bank, or a direct-deposit chargeback in order to recover an overpayment. Merchant error – A merchant may improperly debit a customer's account due to human error. For example, a customer may authorize a $5.00 purchase which may post to the account for $500.00. The customer has the option to recover these funds through chargeback to the merchant. Chargeback to merchant – A merchant account could receive a chargeback because of making an improper credit or debit card charge to a customer or a customer making an unauthorized credit or debit card charge to someone else's account in order to "pay" for goods services from the merchant. It is possible for the chargeback and associated fee to cause an overdraft or leave insufficient funds to cover a subsequent withdrawal or debit from the merchant's account that received the chargeback. Authorization holds – When a customer makes a purchase using their debit card without using their PIN, the transaction is treated as a credit transaction. The funds are placed on hold in the customer's account reducing the customer's available balance. However, the merchant does not receive the funds until they processes the transaction batch for the period during which the customer's purchase was made. Banks do not hold these funds indefinitely, and so the bank may release the hold before the merchant collects the funds, thus making these funds available again. If the customer spends these funds, then, barring an interim deposit, the account will overdraw when the merchant collects for the original purchase. Bank fees – The bank charges a fee unexpected to the account holder,