Where it usually breaks
And how to keep it from happening.
- Partial shipments and receipts support only partial billing. Check the remaining allocation before a second invoice.
- A sent payment instruction is not a settled payment. Reconcile uncertain results against bank evidence.
- A receipt may be posted yet unapplied. It should remain visible until an eligible invoice consumes it.
- A posted error needs a linked reviewed correction; changing a historical journal would break the cutoff evidence.