Where it usually breaks
And how to keep it from happening.
- The quoted amount is presented as money collected. Use the provider event and its verification state.
- An uncertain receipt is marked complete because the booking screen looks correct. Compare the actual expected effects.
- A repeated provider event is treated as another payment. Reconcile its provider identity before interpreting totals.
- Reconciliation triggers a fresh external action. Separate investigation from any explicitly authorized corrective execution.