The Apollo insurance covers are autographed postal covers signed by the astronaut crews prior to their mission. The Insurance Covers began with Apollo 11 and ended with Apollo 16. The ability of astronauts to obtain much life insurance was limited because of their risky Moon missions, so they signed hundreds of postal covers before they left, with the understanding that they would become highly valuable in the event of their death. The crew would designate a trusted ally with the covers who would then have them canceled at the Kennedy Space Center (KSC) post office on the day of launch and/or on the day of the lunar landing.