An invoice is a document that a seller sends to a buyer to request payment for goods or services provided. It typically includes important details such as the date, a description of the items or services, the total amount due, and payment terms. Invoices help keep track of transactions and ensure that both parties are clear about what has been agreed upon. When a business receives an invoice, it serves as a formal record of the purchase. The buyer can use the invoice to verify the details and make sure they pay the correct amount. Properly managing invoices is essential for maintaining good financial practices and relationships between vendors and customers.