# BR-DE-9

Source: https://xmlvalid.com/rules/BR-DE-9

> Das Element "Buyer post code" (BT-53) muss übermittelt werden.

- Level: error
- Rule sets: XRechnung 3.0 rules (UBL) 2.6.0
- Context: `/ubl:Invoice/cac:AccountingCustomerParty/cac:Party/cac:PostalAddress | /cn:CreditNote/cac:AccountingCustomerParty/cac:Party/cac:PostalAddress`
- Test: `cbc:PostalZone[boolean(normalize-space(.))]`

> Das Element "Buyer post code" (BT-53) muss übermittelt werden.

- Level: error
- Rule sets: XRechnung 3.0 rules (CII) 2.6.0
- Context: `/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:BuyerTradeParty/ram:PostalTradeAddress`
- Test: `ram:PostcodeCode[boolean(normalize-space(.))]`

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