My 7000NEX needed to get some repairs done under warrenty but i couldnt find my invoice for it. the warranty dept. at pioneer told me that it's not a problem they will just use the manufactured date of the head unit. i got min from an authorized dealer and do have the invoice now but the point of my story is you guys that got yours from ebay or whatever you can still get your radio fixed under the warranty if you tell them you lost your invoice