In order to comply with regulations and ensure that an electronic invoice has the same legal validity as a paper invoice, the corresponding electronic document must contain the same mandatory fields as any other invoice, must be signed with an electronic signature based on a recognized certificate and must be sent from one computer to another with the parties' mutual consent. This combination of factors provides a Telematic Invoice with sufficient reliability so as to indisputably guarantee its integrity and the authenticity of its origin.
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.