Do people not keep receipts for their more expensive items?
At the end of the day the HCEO's are hardly going to turn up and threaten to take away a bookshelf, or a set of cupboards. They'll look at high priced goods, typically electronics - TV's, Stereo systems, games consoles, PC's/Laptops etc. Surely you'd keep your receipt for those even if only for warranty purposes?
Also with all the stuff that people buy online these days, you'll have a digital receipt emailed to you. Or purchases through Amazon for example are all tracked in your account - and go back years.