I've bought the Msi geforce gtx 1050 ti 4gt oc from Amazon. The shipment didn't include any receipts. When I tried to print the invoice from Amazon website, I've noticed that it doesn't has the serial number on it. If I ever need to RMA this gpu, do I have to send a receipt that include the serial number ? Can Amazon's invoice be used as proof of purchase even though it doesn't have the serial number ?