append, upend

Append or append means to add or attach; as a supplement or signature--
Make sure to leave a space to append the signatures.
We can append a list of suggestions for further study, at the back of the book.

Upend or upend means to set on end, as a crate or piece of furniture; literally or figuratively--
The furniture may fit in the truck if we upend the dresser.
To conform with the new regulations, we'll need to upend our entire security system.

Now that you know that, you can say--
"We don't need to upend our accounting system; just tell everyone to append their receipts."