An invoice is a financial document issued by a seller to a buyer, detailing the goods or services provided, their quantities, and the agreed-upon prices. This document typically includes the names and contact information of the seller and buyer, the invoice number, the date of issue, payment terms, and any applicable taxes or discounts. Invoices serve as a formal request for payment, helping businesses keep track of sales transactions, manage accounts receivable, and maintain accurate financial records. Invoices also provide buyers with a record of their purchases, which can be used for financial reporting, tax filing, and expense tracking. Issued after a sales transaction has taken place, an invoice contains information such as the date and place of the transaction, descriptions and quantities of the goods or services, payment terms and deadlines, and details of the parties involved in the transaction.