Sorry it's so massive, I've tried for ages to try and understand how to post a proper pic. The 3 lines of instructions on this site mean absolutely nothing to someone like me who has no YaBB or HTML skills.
As I've been told, this yellow sticker was only on NES Sealed games to be sold in select stores. Sorry it has to be covered up, but there's NOTHING online about them and I don't want people printing out fakes. There are many more lines missing.
Any help would be much appreciated.
Ben

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Well I think you answered your own question. Those stickers were put on the outside? So when you broke it open, you were unable to reseal it.

One way to protect sealed products is by preventing people from resealing them. Sometimes people use stamps, as well as specially printed packaging.