Having just read Jinksy's post about sought-for-items disappearing into the black holes that surely must exist in her house, I am reminded of a common saying in our own domicile.
Long ago, we owned a car that required its second muffler replacement. I'm not sure if it is still this way, but back then the muffler places would offer a free replacement for as long you owned your car. You just had to show them the receipt of the original work. Of course, although Cuppa is a pretty darn good keeper-of-records, we never did find that blasted receipt, which is odd considering the myriads of useless, decades-old receipts that I did stumble across when sorting and discarding old paperwork for our move a few years ago.
But ever since then, when we are having trouble locating something, we are wont to say, "It must be with the muffler receipts."
PS: In later times, I regretfully discovered that the supposed free muffler wasn't all that fantastic a deal since it just included the relatively inexpensive muffler and neither labour nor the very expensive pipes that must invariably be included and attached. Nevertheless, I really would have liked to have hung onto those few extra muffler dollars back then.