Consider this a public service announcement: Registered Mail is NOT near as great as presented or generally believed.  Registered Mail CAN and DOES get lost.  USPS - because the items insured are collectibles - CAN and WILL do everything possible to avoid paying a claim for a lost package.   I submitted 12 books to CGC for a client back in December 2019. The books were graded and shipped back to him via Registered Mail insured for $500 in January 2020.  There was a problem delivering - con