Rule of life

Always save receipts. Even if it's for, like, fruit. You never know.

I got a bill yesterday for something I had paid for five months ago. Luckily, I saved all my receipts from last year rather than throwing them out right away. So I could prove I paid. (I paid in cash, so there was no credit card backup).

Just a little lesson. Or maybe the lesson is not to pay in cash...but if you do, get a receipt and save it!