Impersonate

Hi, 

A couple of times, I had staff create a new sale and not void it when its not happened. They have the sale as saved and then go home (Half day ect) and then when I come to end of day the tills, I cant as theres a open order. I dont have the staffs log ins so I have to reset the users password. log in and void the order and then ask them to reset it when there back. 

Would there be a way for either a manager to transfer the order to there login or a impersonate button to be able to void it?