http://prntscr.com/foalbo Logitech
http://prntscr.com/foap2p SteelSeries
http://prntscr.com/foar5d EVGA, that is a screenshot of a screenshot, I have since lost the email with the original receipt, all I have is a screenshot that I sent to a friend proving to him that I SE'd EVGA

I cannot provide proof of the other as I usually change my emails and forget all the stuffs in those