What it means
This rule counts ram:IssuerAssignedID elements inside each ram:SellerOrderReferencedDocument under ram:ApplicableHeaderTradeAgreement. There must be one identifier element. BT-14 is the seller's sales order reference, not the buyer's purchase order number (BT-13). The test does not check the identifier's text. It applies to the EN 16931 and Extended profiles of Factur-X and ZUGFeRD.
Why it matters
The sales order reference identifies the seller's order associated with the invoice. Its XML representation has one identifier element, so missing or repeated elements do not follow that structure.
How to fix it
Check the sales order reference (BT-14) in your source invoice, keeping it separate from the purchase order number (BT-13). In the XML, put the correct seller order number in one ram:IssuerAssignedID inside ram:SellerOrderReferencedDocument and remove duplicate identifier elements. If no sales order reference applies, remove the whole ram:SellerOrderReferencedDocument. Export and recheck your invoice.
Once the file is corrected, check it again for free: Validate a ZUGFeRD invoice
Or fix the invoice in a form and download the corrected file, for 1 credit: Fix a rejected e-invoice Beta
The rule as published
Element 'ram:IssuerAssignedID' must occur exactly 1 times. Where this rule applies
| Rule set | Version |
|---|---|
| Factur-X 1.09 EN 16931 | 1.0.9-2 |
| Factur-X 1.09 EXTENDED | 1.0.9-2 |
| ZUGFeRD 2.5 EN 16931 | 2.5.2 |
| ZUGFeRD 2.5 EXTENDED | 2.5.2 |
Check your file
Drop your e-invoice to see whether FX-SCH-A-000572 still fails, and which other rules do.
Related rules
- FX-SCH-A-000573 The tax representative country must be a valid two-letter code
- FX-SCH-A-000574 The tax representative's VAT number needs the scheme VA
- FX-SCH-A-000575 The seller's legal information may appear only once
- FX-SCH-A-000576 Use no more than one seller contact on the invoice
- FX-SCH-A-000577 The seller contact email needs one address element
- FX-SCH-A-000578 The seller's contact phone must hold exactly one number