The payment due in seven (7) days invoice is used to bill a person who has exactly one week to make a payment for goods and/or services rendered. The collector (individual/company who provided the goods or services) will include an itemized list of all goods and/or services and their associated costs. The grand total will be written at the bottom of the invoice along with the date upon which payment must be made. Companies or individuals that have a payment policy in place should provide a quick explanation of any penalties or late fees arising from a late payment; there is a blank field at the bottom of the invoice for such a comment. A Past Due Invoice can be used if the debtor still has not paid in full by the payment due date.