One of the systems that have been introduced in the Draft Royal Decree, which introduces new billing requirements, is the “VeriFactu” or “Veri*factu” system. We can define it as software that complies with the Royal Decree-Draft Law, which was published in February 2022 and introduces fiscalization in Spain. More precisely, a “VeriFactu” system is a verifiable receipt (invoice) issuance system, and its adoption is voluntary under the Draft Royal Decree.
Source: www.fiscal-requirements.com