JohnDize
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- Crisfield, MD
Actually it's the "product key" which is important here.
On pre-Win8 machines, the product key was printed on a Certificate Of Authenticity (COA), which is simply a piece of paper that had the product key printed on it. With desktops/towers, the COA paper was affixed to the side of the case; with laptops, it was affixed either on the underside of the case or within the battery enclosure.
Starting with Win8 PCs, the product key was imbedded in the BIOS and often read by PC Techs using RWEverthing (http://rweverything.com/) or lately with ProduKey from NirSoft (http://www.nirsoft.net/utils/product_cd_key_viewer.html). Since the product key is in the BIOS, there's no need to print a paper COA.
Bottom line, it's not the COA paper that matters, it's the product key itself.
The product Key is NOT important, you need to look into REFURB guidelines. Using an OEM product key without the OEM re installation software is illegal.