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DE-R-020

If both supplier and customer are located in Germany, the element "Debited account identifier" (BT-91) should contain a valid IBAN if code 59 SEPA is provided in "Payment means type code" (BT-81).

warning: reported, still valid Peppol documentation ↗

What the rule checks

As the rule set's publisher wrote it. The rule runs on every element the context matches, and fails where the test is false; the validator reports the line of that element.

Peppol BIS Billing 3.0 rules 3.0.21
Context
(/ubl-invoice:Invoice/cac:PaymentMeans[normalize-space(cbc:PaymentMeansCode) = '59'] | /ubl-creditnote:CreditNote/cac:PaymentMeans[normalize-space(cbc:PaymentMeansCode) = '59'])[$supplierCountryIsDE and $customerCountryIsDE]
Test
not(normalize-space(cbc:PaymentMeansCode) = '59') or matches(normalize-space(replace(cac:PaymentMandate/cac:PayerFinancialAccount/cbc:ID, '([ \n\r\t\s])', '')), '^[A-Z]{2}[0-9]{2}[a-zA-Z0-9]{0,30}$') and xs:decimal(string-join(for $cp in string-to-codepoints(concat(substring(normalize-space(replace(cac:PaymentMandate/cac:PayerFinancialAccount/cbc:ID, '([ \n\r\t\s])', '')),5),upper-case(substring(normalize-space(replace(cac:PaymentMandate/cac:PayerFinancialAccount/cbc:ID, '([ \n\r\t\s])', '')),1,2)),substring(normalize-space(replace(cac:PaymentMandate/cac:PayerFinancialAccount/cbc:ID, '([ \n\r\t\s])', '')),3,2))) return (if($cp > 64) then string($cp - 55) else string($cp - 48)),'')) mod 97 = 1

Checked with Peppol BIS Billing 3.0 Invoice, Peppol BIS Billing 3.0 Credit Note