Shopify shows Italian tax fields at checkout but cannot make them required or validate them. CF Ready does: Codice Fiscale, the Italian tax code, and PEC can be optional or required, with formal validation before order completion. It adds no fields, changes no theme, and does not require Plus. If the app is unavailable, checkout stays open, and foreign customers are never blocked. Validation is formal, not identity-based: it does not certify that a tax code belongs to the person entering it.

• Codice Fiscale (Italian tax code) required and formally validated at checkout.
• PEC as an independent rule: require it with Codice Fiscale or leave it out.
• No theme changes: uses the tax fields Shopify already provides for Italy.
• Foreign customers excluded: the rule applies only to Italian deliveries.
• Never blocks on errors: checkout always stays open.