For the electronic handling of the Value Added Tax (VAT) in Spain, the Immediate Supply of Information (SII) determines the exchange between tax payers and the tax agency AEAT. With this system, invoices are given an electronic signature.
As most aspects of SII are configured upon installation and dealt with by the respective technicians, this section provides some basic information for SIHOT users.
Hotels are required to obtain a certificate, a certificate password and a service-URL, which are assigned by the SII website. For more information refer to: http://www.agenciatributaria.es/AEAT.internet/en_gb/SII.html
It should be noted that at present, SIHOT can only conduct a rudimentary check of document numbers (format and structure), due to a lack of proper instructions and documentation.