Ride, I would recommend you to purchase Intel products from authorized distributors only.
Intel products have 3 years of warranty from the date of purchase. So to claim the warranty of your CPU it will be necessary to have the proof of purchase. Also, this warranty will be giving to the original buyer.
If you are not purchasing the processor from an authorized distributor, it is also important to make sure you are not getting a defective product or an Engineer sample.
Additional information about the warranty process can be found at these 2 links: