You didn't save the receipts or cards??
You save the cards and receipts forever? Come on. OP had no way of predicting that the charges would be reversed.
Personally, if I cash out by MO, then once the deposit clears my bank account, I toss the cards and receipts. If I cash out by RC, then also once the money makes it to my bank account I toss the cards and receipts. Until that point, yes, I hold on to them, but I can't keep endless clutter in my life.
ETA: Just to clarify, in the case OP describes, yes, I would have still had the cards and receipts until the funds were OUT of Paypal's hands. But once I had the money in my bank, you can bet I am tossing the plastic and paper in the trash.