E-invoicing rules for Gas/HVAC Engineers in Italy: already mandatory for essentially all invoices

Fatturazione elettronica is mandatory for essentially all B2B and B2C invoices. This is not a future deadline — it applies today. Italy has required electronic invoicing since 2019. The accepted format is FatturaPA (XML). Sistema di Interscambio (SDI), which validates and can REJECT. This is the position as at 8 October 2026 — e-invoicing legislation is moving quickly across the EU, so confirm against current national guidance before relying on a date. Vasco generates FatturaPA (XML) directly from an invoice, so a Gas/HVAC Engineer does not need separate software to comply.

FatturaPA (XML). A PDF emailed to a customer is NOT a structured e-invoice — a PDF is an image of an invoice, whereas the mandate requires machine-readable data that the recipient's system can process without retyping. Sistema di Interscambio (SDI), which validates and can REJECT. Vasco produces the structured file from the invoice you already raised, rather than asking you to rebuild it in a separate tool.

Understand what happens on a scarto (rejection): a rejected FatturaPA means the invoice was never legally issued, so it must be corrected and resent within the allowed window. Two practical points that catch out small trades businesses: being able to RECEIVE a structured invoice is often required earlier than issuing one, and 'sent' is not the same as 'accepted' — in Italy and Spain the authority can reject a filing, and a rejected invoice was never legally issued. Vasco tracks that distinction so a Gas/HVAC Engineer can see which invoices are genuinely filed and which were refused.

No. The requirement is a valid structured file in the correct format, not a particular class of software or an ERP. A self-employed Gas/HVAC Engineer can comply with a tool that produces FatturaPA (XML) correctly and keeps the audit trail. Vasco is built for one-person and small trades businesses across six European markets and generates the formats each one requires, so you are not paying for an enterprise system to satisfy a rule aimed at invoice data.