In the old days, banks would not allow you to overdraw your account. However, many of them now have policies that allow your account to be overdrawn when you make a debit purchase, and they'll charge you an overdraft fee if you spend beyond your means. You can get an overdraft fee taken off your bank account, but be warned: if you routinely overdraw your account, the chances of getting your overdraft fees reversed are slim to none.
Review your recent account history or your latest banking statement and see what charge caused your account to become overdrawn. Know exactly how much the account was overdrawn by. If it was a very small amount, you'll have a much easier time getting the fees reversed.
Visit your bank and ask to speak with a manager. Bank tellers probably don't have the authority to remove your fees. Bring all of your paperwork with you.
Explain to the manager exactly what happened with your account. Point out the purchase that initiated the overdraft fee and ask the manager to remove the fee. If this is the first time you've overdrawn your account, say so. Make sure that the manager knows about any other accounts that you have at the bank. He or she will be more willing to deal with a prolific customer.
Offer to link your savings account to your checking account for overdraft protection if the manager isn't sure about waiving the fee. You can also offer to sign up for overdraft protection in the form of a line of credit. The line of credit would only be charged when your account becomes overdrawn.
Be prepared to close all of your accounts if the bank won't work with you. You'll have to bring your accounts current before you can close them. If the bank is willing to lose you as a customer over a one-time overdraft, you probably won't want to continue banking there anyway.