A signature panel code exists in—you guessed it —the signature panel on the back of your credit card. It’s three or four digits that are required to make purchases online.

The 2016 Noir Kobe Bryant Spotlight Signatures /125 #6 Raw set an all-time high when it sold for $16,651.00 (Sep 27, 2021) via Auction with eBay. The card sold for $7,999.99 (Jun 09, 2020) a year ago.