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Microsoft Certificate of Authenticity (Torn Labels)
Microsoft redesigned the COA label as a running change from Aug/2006 as a part of piracy prevention.
The new COA label has a transparent Port-Hole (as circled in red) which prevents a removed COA label from being reaffixed.
The Port-Hole area of COA is not affixed to the body of the computer and may lift slightly and get chafed during transportation. As a result there is a possibility that some customers may raise inquiries because the COA label seems to be damaged or torn due to the appearance of the Port-Hole.
Be assured that the Microsoft COA label is a genuine proof of authenticity from Microsoft regardless of the torn-look of the Port Hole.