The payment due in fifteen (15) days invoice is a bill containing charges for goods and/or services delivered to a client or customer from a collector (individual or company who provided goods/services). Some companies require clients to pay within a certain timeframe, and this invoice can be used to request that payment be made specifically fifteen days after the invoice was issued. The invoice should breakdown all costs and charges accumulated by the client; this includes a brief description of all goods sold or services rendered along with their associated costs. The total amount due, including taxes, will be written at the bottom of the receipt with the exact date upon which payment must be made. If the client fails to pay before or on the payment due date, the collector may wish to issue a Past Due Invoice.