State Public Utility Commissions (PUC) have established very specific rules as to how a partial payment must be applied. Their intent is to protect regulated services, such as your home phone. As a result, in most states, undesignated partial payments are applied to the phone portion of your bill (if you have phone service) until that portion is paid in full. Any remaining money is paid proportionately to all the other charges on the account. This is called a "pro-rata" allocation.
You have the right to override the state allocation rules and divide your payment however you wish. Please contact us if you would like your payments applied differently.