Although we know perfectly well what an invoice is, its technical definition is "a document that reflects the delivery of a product or the provision of services, along with the due date and the amount to be paid in consideration." All invoices, regardless of the way in which they are sent (whether on paper or in electronic format), must include a series of mandatory fields. Article 6 of Royal Decree number 1496, Spanish law, which regulates the content of an invoice, establishes these fields as: Invoice number. Delivery date. Sender's and recipient's legal name. Sender's and recipient's Tax ID number. Sender's and recipient's legal address. Transaction description (tax base). Tax rate. Tax amount. Date of service (if different from the delivery date)
Types of Electronic Invoices _ An electronic invoice is one which meets the same requirements that apply to invoices issued on paper, except that it is presented in electronic format and its authenticity and integrity are guaranteed. In order to guarantee a document's authenticity and integrity, there are three possible methods: Utilization of a recognized digital signature, which is based on a recognized certificate and generated using a secure device for creating signatures. Remittance through an "EDI" system, which ensures integrity and authenticity. Use of another system which, in the opinion of the Auditing Department of the State Tax Agency, ensures authenticity and integrity, whenever the taxpayer issuing the invoice has applied for Agency approval of the system in question. In general, the use of a recognized electronic signature is considered to be an essential element of electronic invoices.