BR-16

The invoice must contain at least one invoice line (BG-25). A document consisting only of header and total data is not permitted.

Severity: Error
Applies to: CII, UBL
Rule set: v2026-01-31

Official rule text

An Invoice shall have at least one Invoice line (BG-25).

Why it happens

Appears when the generator builds lines from an item list and that list is empty — typically flat-fee or instalment invoices that are managed internally without line items.

How to fix it

Emit exactly one line even for a flat amount: quantity 1, the amount as unit price, a descriptive name. That is cac:InvoiceLine in UBL, ram:IncludedSupplyChainTradeLineItem in CII.

NormAPI provides technical validation, not tax or legal advice.