If you've paid your bill late two or more times within a six-month period and there is a difference of $50 or more between the deposit FPL received for your account and the two months' average bill at your residence, a deposit adjustment may be required.  A review process is triggered automatically to determine whether an additional deposit is required. Several factors are taken in consideration including, the length of time you have been an FPL customer, your payment history, and the amount of your current deposit.