What it means
The direct debit block (BG-19) holds the mandate reference (BT-89), the creditor identifier (BT-90) and the account to be debited (BT-91). The check counts the mandates (cac:PaymentMandate) in the payment means of the whole invoice and allows at most one.
Why it matters
EN 16931 allows one direct debit mandate per invoice. With two, the recipient cannot tell under which mandate the amount is to be collected, so the invoice is rejected.
How to fix it
In your invoicing software, check that only one direct debit mandate is attached to the invoice, the one that applies to this buyer. If you build the XML yourself, keep one cac:PaymentMandate in cac:PaymentMeans.
The rule as published
An Invoice shall contain maximum one Payment Mandate (BG-19). Business terms: BG-19
Where this rule applies
| Rule set | Version |
|---|---|
| EN 16931 (UBL) | 1.3.17 |
| EN 16931 (UBL credit note) | 1.3.17 |
| XRechnung 3.0 (UBL) | 3.0.2 |
| XRechnung 3.0 (UBL credit note) | 3.0.2 |
| Peppol BIS Billing 3.0 (invoice) | 2026.5 |
| Peppol BIS Billing 3.0 (credit note) | 2026.5 |
| SI-UBL 2.0 / NLCIUS (invoice) | 2.0.3.13 |
| SI-UBL 2.0 / NLCIUS (credit note) | 2.0.3.13 |
| France CTC (UBL invoice) | 1.4.0-04 |
| France CTC (UBL credit note) | 1.4.0-04 |
| CIUS-RO UBL Invoice 1.0.9 | 1.0.9 |
| CIUS-RO UBL Credit Note 1.0.9 | 1.0.9 |
Check your file
Drop your e-invoice to see whether UBL-SR-55 still fails, and which other rules do.
Related rules
- BR-DE-23-B Bank transfer payments must not carry card or debit details
- BR-DE-24-B Card payments must not carry bank account or debit details
- BR-DE-25-A Direct debit payments need the direct debit details
- BR-DE-30 Creditor identifier is required
- BR-DE-31 Account to be debited is required
- CII-SR-496 An invoice can name only one direct debit account