Each Certificate of Authenticity is specific to the piece, edition number, and individual collector. The Collector’s Registry Envelope, with accompanying RSVP card, is included in the shipment with each piece. Once the piece sells, the nonprofit has the privilege of presenting the envelope to the winning bidder, who will then fill out the registry RSVP card and post it in the pre-stamped, return envelope.  The customized Certificate of Authenticity is then created and mailed directly to the collector.