# IT-R-004

Source: https://xmlvalid.com/rules/IT-R-004

> BT-38 (Seller post code) - Italian suppliers MUST provide the postal address post code - I fornitori italiani devono indicare il CAP di residenza.

- Level: error
- Rule sets: Peppol BIS Billing 3.0 rules 3.0.21
- Context: `cac:AccountingSupplierParty/cac:Party[$supplierCountry = 'IT']`
- Test: `cac:PostalAddress/cbc:PostalZone`

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