I am not sure why is there so many names for delivery person: Courier, messenger, dispatch boy/ clerk/ rider, dispatcher, delivery person /man, and even postman.
This is my 4th job as delivery man, the first three jobs went unwell, only lasted for 3 months, 1 month and half year respectively.
The job handling is easy, I just need to scan the barcode once when going out to deliver, and scan the barcode for another time when the receiver signing the parcel.