errorubl-2.1
UBL-SR-09:Invalid boolean value
Boolean elements must be true or false.
We can fix this automatically
AUTO-FIXAuto-fix: Keep the first occurrence and remove duplicate elements. EN16931 requires exactly one of this element.
No manual changes needed
Upload and Fix NowWhy This Error Matters
Invoice will be rejected by EN16931 validators. These structural constraints ensure consistent processing by receiving systems.
How to Fix It
1
Check boolean values
ChargeIndicator, PriceType, etc.
2
Use correct format
true or false (lowercase)
Technical Details
XPath: //cbc:ChargeIndicator, //cbc:MultiplierFactorNumericCommon Causes
- ERP system exports multiple references where only one is allowed in EN16931
- Data consolidation merged records that should have been deduplicated
- Template or mapping incorrectly configured to output duplicate elements
- Manual editing introduced extra elements
- Invoice conversion from another format did not merge duplicate entries
Frequently Asked Questions
Boolean elements must be true or false.
Use lowercase true or false. You can also use Invoice Navigator's automatic Fixer tool to correct this instantly.
Yes, UBL-SR-09 is a critical error that will cause invoice rejection. It must be fixed before submission.
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Last updated: 16 January 2026
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