Mac Tool Question ?

Some years back, I had an issue with "do you have the reciept?" (not with a tool truck vender) Who the hell keeps those thermal paper recieptes? I do, now. I get a reciept, and put it in my printer/copier. then staple the original to the copy. Put it in my file cabinet, by month and year. I can go back about 15 years, and it saved me an issue with the IRS