BR-CO-12: The header sum of charges (BT-108) does not equal the actual sum of the…
What it means
The header sum of charges (BT-108) does not equal the actual sum of the individual document-level charge amounts (BT-99).
How to fix it
Recalculate BT-108 as the exact sum of all document-level charge amounts and re-issue. Arithmetic mismatch -- reported, never auto-repaired.