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BR-DE-30BT-90
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The bank assigned creditor identifier is missing
When the `DIRECT DEBIT` group (BG-19) is present, the `Bank assigned creditor identifier` (BT-90) 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.
Why this error happens
This is the creditor identifier the bank assigns, and without which no SEPA direct debit can be executed. It is stable over time, which is why it gets forgotten: it is captured once, often outside the invoicing system.
How to fix it
Copy the creditor identifier from your direct debit agreement. Factlint does not write it: it is a payment detail (rule 1).