1. A system for managing content requests comprising: one or more data stores for maintaining entries in tracking information, the entries identifying requested resources; and at least one processor corresponding to a content delivery service provider operative to host or process content on behalf of an origin source, the at least one processor executing instructions to: associate resources obtained from the origin source with entries in the tracking information; determine one or more entries in the tracking information are invalid prior to termination of expiration criteria associated with one or more resources corresponding to the one or more entries, wherein the determination is based on processing consistency check information received from the origin source or a third party component; and process the one or more resources corresponding to the one or more determined invalid entries in the tracking information.