# IS-R-007

Source: https://xmlvalid.com/rules/IS-R-007

> If seller is icelandic and payment means code is 42 then a 12 digit account id must exist — Ef seljandi er íslenskur og greiðslumáti (BT-81) er millifærsla (kóti 42) þá skal koma fram 12 stafa reikningnúmer (BT-84)

- Level: error
- Rule sets: Peppol BIS Billing 3.0 rules 3.0.21
- Context: `ubl-creditnote:CreditNote[$SupplierCountry = 'IS'] | ubl-invoice:Invoice[$SupplierCountry = 'IS']`
- Test: `exists(cac:PaymentMeans[cbc:PaymentMeansCode = '42']/cac:PayeeFinancialAccount/cbc:ID) and string-length(normalize-space(cac:PaymentMeans[cbc:PaymentMeansCode = '42']/cac:PayeeFinancialAccount/cbc:ID)) = 12 or not(exists(cac:PaymentMeans[cbc:PaymentMeansCode = '42']))`

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