Invoice 1 is a financial document that is used to record the sale of goods or services between two parties. It is typically issued by the seller to the buyer and includes details such as the total cost of the transaction, any applicable taxes, and the payment terms. It is also used to track payments and can be used to reconcile accounts. There are several types of Invoice 1. These include the commercial invoice, which is often used for international shipments and includes the Harmonized Tariff Schedule code; the pro forma invoice, which is a quote for goods or services; the credit memo, which is used for returns and refunds; and the self-billing invoice, which is used in certain situations for buyers to invoice themselves.