In terms of auditing, we do evaluate other services the carriers offer (like address corrections, residential surcharges, etc), as well as help our customers ca

In terms of auditing, we do evaluate other services the carriers offer (like address corrections, residential surcharges, etc), as well as help our customers catch things like unmanifested shipments (ie, you print off a label, customer cancels order, and you don't cancel out that shipment). We have a full suite of reports and analytics that extend beyond just our service. We also provide contract analysis and optimization. In terms of resources, of course I have to point to our blog and podcast, available from RefundRetriever.com.