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Posted By: Hankron

If forgery of these stamps is not a problem but the collector worries that it may become one in the future, he can document the stamp's authenticy for posterity by establish the date he bought it or owned it or even digging back further into its history (was auctioned in 1999 by Lew Lipset). Getting an Old Put graded or printing out the eBay sales page would be examples of good documenting.