Offer a managed audit and recovery service that reconciles marketplace orders against label purchases, carrier adjustments, refunds, and seller payouts. The operator identifies recoverable charges, assembles dispute packets, guides or manages carrier and marketplace claims, and corrects package presets and shipping policies to prevent repeat losses. Begin with one-time audits priced with a minimum fee plus a percentage of recovered funds, then offer recurring monthly reviews to higher-volume sellers.

Rising parcel costs and marketplace fees make shipping mistakes more damaging to low-margin sellers. The signals also show sellers struggling with opaque adjustments and fragmented support processes, creating room for an independent specialist rather than another general selling application.