What is an invoice?

An invoice is a critical document in business transactions, serving as a formal request for payment issued by a seller to a buyer. It details the items or services provided, including quantities and corresponding prices, allowing the buyer to understand what they are being charged for and facilitating the payment process.

In essence, the invoice helps maintain clear communication between the parties involved, ensuring that the buyer is aware of their financial obligation and the seller has a record of the transaction. This clarity is essential for proper accounting and record-keeping on both sides.

While the other options describe different types of documents or requests related to business, they do not capture the specific purpose and function of an invoice. The invoice specifically pertains to the sale of products or services, making it a vital tool for financial transactions.