Just want to share some experience of mine. Why receipts of lens and body are so important?

One of the reason is: If your lens and camera were stolen or robbed in a trip, the insurance company need the receipts. Without the receipts, you are not able to claim. I claimed about $1700 from an insurance company for my trip in South America. Although each item has a limit to claim(roughly 300-500 dollars), it is better than nothing.