We try our best to help, and if you do not have a receipt, we can look at the manufacture date listed on your product. If it is within 1 year, then we can. The receipt guarantees the warranty, though, so if it isn’t digital, try taping it to an inconspicuous area, such as the back panel.
Online shopping makes obtaining a proof of purchase a fairly easy endeavor and it is generally possible to get a duplicate copy from the retailer. If you contact them with basic information, such as the card you used and the date of purchase, they should be able to assist.