Today I released v3.4 of FatturaElettronica, a .NET open source project that allows validation and de/serialization of electronic invoices adhering to the standard defined by the Italian “Agenzia delle Entrate”. It’s doing very well for such a niche project, with downloads now well beyond the one hundred thousand mark.
Be aware that this release anticipates support for v1.7.1 of the specification going into effect on October 1, 2022. For more information, see the appropriate ticket and the changelog.