[nolemmings]

Assuming the cards are not located soon and returned in the same condition, then there likely will be an insurance payout– my guess would be under multiple policies. It is interesting and a bit tricky as to what happens from there if the cards are recovered, particularly if this occurs ad hoc over time. As a general matter yes, the insurer who pays for the loss would be considered the owner entitled to possession once the cards are found. However, I would imagine that before any claim is paid, there will be a written understanding among all concerned regarding any rights to the cards. I can imagine there are myriad scenarios as to who has rights to buy, who must sell, and the process by which the card will be transacted. I would also think that the insurance company could assign its rights to someone for a price and be done with it. Again, a much cleaner process if the entire group is found at once and relatively soon, but a cluster**** if these cards pop up one or a few at a time over the next ten years.
Also keep in mind law enforcement’s role. It is my understanding that if these are recovered and held by law enforcement, the applicable agency may have rules regarding what it requires in the way of authorizations before it will release stolen property. Maybe not a problem by the end of the day for someone relieved to finally get his card, but another party to deal with nonetheless.