Every year they don't find it, the value goes up by $100,000. He can produce it at any time. To make it legit, All Brady has to say is "it was anonymously returned by mail yesterday."
After 25 years, Tom will wear it to Belichick's funeral under a cut off hoodie, then strip it off and drape it over the casket as they lower Bill's body into the ground.
It will be the most valuable grave site in history as Belichick's playbook will be rumored to still be rolled up in his back pocket.
One of Belichick's grandsons will inherit the grave and exume the body along with the spiral notebook and jersey. He will coach The Patriots to the superbowl the next year using the playbook and weating the jersey with the hoodie during the games.
Brady will sue for the jersey back, but die before the case is settled.
Then Hoodie Jr. will be forced by the courts to surrender the jersey to an aging Giselle. She will allow Tom Brady to be buried in the jersey.