# SDI-00417

Source: https://xmlvalid.com/rules/SDI-00417

> 1.4.1.1 <IdFiscaleIVA> e 1.4.1.2 <CodiceFiscale> non valorizzati

- Level: error
- Rule sets: SdI checks (FatturaPA ordinary invoice) Specifiche tecniche 1.9.1
- Context: `/p:FatturaElettronica`
- Test: `$buyer/IdFiscaleIVA or $buyer/CodiceFiscale`

> 1.3.1.1 <IdFiscaleIVA> e 1.3.1.2 <CodiceFiscale> non valorizzati

- Level: error
- Rule sets: SdI checks (FatturaPA simplified invoice) Specifiche tecniche 1.9.1
- Context: `/s:FatturaElettronicaSemplificata`
- Test: `$buyer/IdFiscaleIVA or $buyer/CodiceFiscale`

In English: The buyer has neither a VAT number (IdFiscaleIVA) nor a tax code (CodiceFiscale): at least one is needed.

Validate a document against these rules: https://xmlvalid.com/validate