What it means
For each invoice line (BG-25), the rule checks that ram:AssociatedDocumentLineDocument has no direct ram:ParentLineID child, except in NLCIUS, where it checks ram:IncludedSupplyChainTradeLineItem instead.
Why it matters
The EN 16931 CII mapping does not represent parent-child line relationships through this element. This check does not determine whether the line amounts are correct.
How to fix it
Remove ram:ParentLineID from each affected ram:AssociatedDocumentLineDocument or, for NLCIUS, directly from ram:IncludedSupplyChainTradeLineItem. Keep each line's own number (BT-126). If the relationship needs explaining, describe it in the line note (BT-127) or item description. Check the updated file again.
Once the file is corrected, check it again for free: Validate an invoice against EN 16931
Or fix the invoice in a form and download the corrected file, for 1 credit: Fix a rejected e-invoice
The rule as published
ParentLineID should not be present Where this rule applies
| Rule set | Version |
|---|---|
| EN 16931 (CII) | 1.3.17 |
| XRechnung 3.0 (CII) | 3.0.2 |
| NLCIUS (CII) | 1.0.3.13 |
| France CTC (CII) | 1.4.0-04 |
Check your file
Drop your e-invoice to see whether CII-SR-036 still fails, and which other rules do.