I recently purchased the same product as you, for a system I'm building for a family member. The Certificate of Authenticity (COA) should be on the back of the DVD case. It's a sticker that is meant to be peeled off and affixed to the PC hardware for which the license applies. Below is what my product looks like.
Contents:
Back of DVD case:
Notice the area I circled in red. This is the COA (yes, a small sticker) and the product key that you need to use to activate Windows 7 is on the COA itself. Of course, I greyed out my license's details; imagine bar codes and hyphenated alphanumeric gobbledygook.
If you didn't get something that looks like that, you probably did not get authentic product. I suggest you first contact the seller to resolve the issue, and failing that, take advantage of any buyer protection you might have. For instance, you could call your credit card company and request a chargeback.
Close-up of a COA:
1"sealed copy" - please clarify, what was in the package? Was there a DVD & booklet in a plastic case covered by a cardboard sleeve? Does the DVD have the orange hologram? What kind of outfit did you purchase this from? – sawdust – 2012-11-05T01:35:56.647
It is an OEM disc just like the one pictured below. In the package was a cardboard sleeve sealed (taped) on bothe ends, a plastic case sealed with warning label, inside the case was Windows 7 Home Premium disc with booklet. Bought off ebay. Yes my mistake. – Tracy – 2012-11-05T01:43:49.003
1@Tracy You need to report this to eBay dispute resolution soonest. You might well get your money back. – Isaac Rabinovitch – 2012-11-05T01:48:22.170
5By the way, I would strongly urge you never to buy a copy of Windows from a place like eBay or Craigslist. There are tons of counterfeits out there, some amazingly good looking. Some even have product keys that seem to work (often MSDN or BizSpark keys) that remain valid for a few weeks or months and then go dead. Even if you got the real COA, someone else may have bought a copy of your product key, leading you to trouble down the road. – David Schwartz – 2012-11-05T04:25:12.217
Get your money back. Good luck. – Xavierjazz – 2012-11-05T04:05:07.340