I was at a client's yesterday and noticed that there had been some questionable transactions happening in the QuickBooks file from the last time I was in there, sound familiar? Thankfully this was an easy one because we had setup usernames in QuickBooks for the various folks who interacted with the file. In under two minutes we figured out who it was, informed the employee of what they had done, and ensured we wouldn't have a problem again. No harm done, just a simple misunderstanding.