An invoice is a document issued by a seller to the buyer stating what the buyer owes him. It has information such as the contact details of both the seller and the buyer and the quantities and costs of the goods or services provided by the seller.
The word "invoice" clearly marks each invoice to distinguish it from other business documents such as receipts. It also has a unique number for reference and a date.
It has the contact details of the sender for the recipient to quickly identify and contact him if necessary. The sender also includes the name and address of the recipient.
It has the date the sender delivered the goods or services and the details of the goods or services. It describes the items by quantity, cost per item and total amount owed. In addition, the invoice includes other details, such as other charges and how to settle the total amount owed.