Should the COA on an Xbox game case ever have any smudging?

[Verm3]

I've been wondering yet again about telling a legitimate game from a fake.

Should the COA on any Xbox game DVD case opening ever have any smudging at all?

[Atariboy]

What's a COA?

[Hardcore Sadism]

What's a COA?

Certificate of Authenticity, pretty much a required notice for selling and even justifying a price tag.

[Verm3]

Indeed. as Hardware Sadism implies, the COA is the 'Certificate of Authenticity' on all Microsoft products.

On Xbox games, the COA is the sticker across the DVD case opening; if a 'new and sealed game' lacks it, then it's an obvious reseal or fake. But naturally, the COA can and has been duplicated.