VeriFactu, TicketBAI and NaTicket are electronic invoicing control systems designed to prevent tax fraud and improve the traceability of income declared by self-employed professionals and companies. TicketBAI, already mandatory in the provincial territories of the Basque Country, requires invoices and receipts to include a TBAI code and a QR code. For its part, VeriFactu, promoted by the Spanish Tax Agency for the common tax territory, and NaTicket, developed by the Tax Authority of Navarra, will soon come into force, establishing new technical requirements for invoicing software and the submission of records to the respective tax authorities.