The debited account identifier is missing
When the `DIRECT DEBIT` group (BG-19) is present, the `Debited account identifier` (BT-91) must be provided.
Only the issuer holds this value: Factlint reports it and never fabricates it. Test your invoice to find out whether it is affected.
The message your validator prints
Copied verbatim from the sealed artefact: this is the exact sentence the check prints when this rule fails.
[BR-DE-31] Wenn "DIRECT DEBIT" BG-19 vorhanden ist, dann muss "Debited account identifier" BT-91 übermittelt werden.
Quoted from schematron-xrechnung 3.0.2, licensed under Apache-2.0.
Common searches around this code
These phrases mirror what an integrator searches for: code, syntax, rule, business field and correction.
Test your file with this error in mind
Upload the invoice involved: the report will say whether this code appears, where it appears in the document, and whether Factlint can only report it or also fix it.
To automate this check in an ERP flow, call the validation API and link every returned code to its public page.
Why this error happens
The counterpart of BR-DE-30: one says who collects, the other from which account. When the account is present but wrong, BR-DE-20 reports it instead, as a warning.
How to fix it
Copy the account from the mandate your customer signed. Factlint does not write it: it is a payment detail (rule 1).
XML correction example
<ram:TypeCode>59</ram:TypeCode> <!-- ram:PayerPartyDebtorFinancialAccount/ram:IBANID absent -->
<ram:IBANID>DE43123456789012345678</ram:IBANID>