I have attached a screen shot regarding an Ebay seller, collectibletrading, that is doing just that. He has a 1966 SMS Jefferson nickel graded MS66 by NGC as a "Cameo" and according to NGC has a value of $20 due to auction sales and population of 153 with 583 in Higher Grades. Of course he has the coin listed for $245 with that sticker from CAC in the top, right corner showing, "UCAM". Now, I have stated this prior and I will do so again, these third party sticker companies that are attempting to confirm or raise the grading of these coins are false, liars and pure garbage. First of all, you can't see or grade the coin properly if it is already encapsulated and sealed in a case nor can you re-grade or give a designation such as UCAM or Full Steps or otherwise on a sticker that anyone can just put on. In the event these Sellers or anyone else believes the technology of today is better than before and believes the Grade given prior could be improved, they should resubmit the coin to have the respective company such as NGC or PCGS to have regraded and the New Grade or designation (if any) can be confirmed, encapsulated and sealed inside the New case forever. Of course they will never do this because its not worth it and there belief may not be share or confirmed by NGC or PCGS. So, in short, beware of these stickers such as CAC and MAC as they are NOT valid and are completely false. Anyone can put a sticker on the outside of a coin capsule stating anything yet, it is NOT real or validated by anyone or any grading service. Please also be aware that "you can't see or grade the coin properly if it is already encapsulated and sealed in a case nor can you re-grade or give a designation such as UCAM or Full Steps" so, don't believe it or buy one for more than what the actual grades states is its value. I hope I have made clear to everyone these companies are false and putting a sticker on the outside of a capsule means NOTHING. These companies are taking your money and you are being ripped off. DO NOT BUY THESE COINS WITH CAC OR MAC STICKERS.