What to collect before you audit
Gather the latest three to six invoices per location, current service schedules, and signed agreements. Without those documents, most audits stall.
Line-item checklist to run every month
Use the same checklist every month so variance patterns are obvious.
- Base service rate by stream and container
- Fuel and environmental surcharge changes
- Administrative and processing fees
- Contamination and overage events
- Extra pickups and unscheduled service
- Taxes and municipal pass-through charges
How to validate each variance
Treat variance review like reconciliation. Tag each increase as contract-supported, service-triggered, or unexplained.
Unexplained charges should be escalated with invoice screenshots and contract references.
What good reporting should look like
Ownership teams need one view showing location-level cost movement, dispute status, and projected monthly impact.
If each site reports differently, recurring leakage will be hard to spot until it is material.
How Corvo uses invoice governance
Corvo applies standardized invoice controls across sites and markets. That allows teams to challenge avoidable charges quickly and maintain clean cost visibility for planning.