Similarities and differences: electronic invoice, SII, VeriFactu and TicketBAI

The Spanish electronic invoice system was established by the Crea y Crece Law, and a draft royal decree is being prepared to regulate mandatory electronic invoices in B2B transactions.
The Immediate Supply of Information (SII) is a system for real-time declaration of VAT records, while VeriFactu is a system for issuing verifiable invoices, which is still in the approval process.
TicketBAI is a project implemented by the Basque Government and the Provincial Treasury to control activities and economic income of contributing companies, gradually coming into force from 2022 to 2024 in different territories.