# What is a proforma invoice? A proforma invoice is a commercial document issued before finalizing a transaction. Unlike a regular invoice, a proforma invoice has no legal or accounting value and does not create an immediate obligation for payment. The proforma invoice is used as an informative and quoting tool, providing details about the products or services offered, including their description, prices, quantities, and commercial terms. Its main purpose is to allow the customer to evaluate and make informed decisions, such as obtaining internal approvals or comparing offers from other suppliers. It is important to note that once the payment is made, it will be understood that the customer has accepted the terms and conditions of the products or services. At that point, the corresponding regular invoice will be issued to formalize the commercial transaction. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://help.sitioshispanos.com/menu-principal/guias/pagos-y-facturacion/que-es-una-factura-proforma.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.