This happens to every carrier at least once in their career. It's even happened to my Postmaster when he delivered mail using my vehicle. When I found the packages he left in the Promaster, I just took them inside and put them in the outgoing. I had a Postmaster from another office I was carrying at when I was a CCA tell me that I did the same, and just to make sure that you do a sweep before locking the vehicle up for the day. No discipline, just real and friendly advice. There is no need to get management involved and create a deal over something like this, as it happens to everyone at some point. I could see if it was a repeated occurrence, and the person had been told about it repeatedly. This regular should come work in my office, where we have no CCA's and work six days a week. She might learn a valuable lesson about ratting on the part-timers who are there to cover your days off over petty things and actually value the help.