Here's a tip that could be useful at Home Depot, since they sell Rigid equipment . . .
A year or two ago, I bought a universal mitre saw stand from Home Depot that had been their display model. I was doing this through the contractor counter, and as I'm paying for it the guy I'm dealing with tells me, "If you have any problems, just bring it back." He then hands me a receipt that's printed on an 8x1/2" x 10" sheet of paper with a laser printer. I must have looked at this reciept a bit quizically because he then told me, "Hey, anytime you need to buy something expensive and want to get a receipt that won't fade on you, bring it to the contractor counter and we'll ring it up here."
So, that might be worth doing if you don't have ready access to a copier or scanner for the regular thermal printed recepts from Home Depot. I've done this several times at my local store, I have no idea though if this is a policy that's honored at all the stores.