Exactly. I was not aware of this and I do not know how to have a coin done. I guess I do now.
NGC offers a certification option for United States Mint Official Commemorative Coin Covers. NGC grades the enclosed coins and seal the entire US Mint cover within a clear semi-rigid plastic sleeve. This allows the US Mint packaging to be preserved while receiving the advantages of an NGC certified grade. A label across the top of the holder describes the cover and enclosed coins. If the coins are of matched grade, a single grade line appears on the label. If they receive different grades, two lines of text are used to describe each coin individually (see photos).
Coin covers are presentation holders offered by the U.S. Mint, consisting of a mailing envelope with enclosed coin(s), and a cancelled postage stamp. The date of the stamp’s cancellation is the coin’s first day of issue, the day the coin was released into circulation. For this reason, collectors often refer to coin covers as "First Day Covers," abbreviated "FDC." Many U.S. Mint covers are eligible for certification under this new service, including, for example:
50 State Quarters Official Commemorative Coin Cover
Westward Journey Nickel Series Official Commemorative Coin Cover
Sacagawea Dollar United States Mint Official Commemorative Coin Cover
United States Mint Official American Presidency $1 Coin Cover