How can lawn service customers pay without employees handling money?

Hello, i am going to start a lawn mowing business and i Dont want my Foreman or Helper handling the money that i recieve from my customers. i live in north texas and my business will be located in austin- kind of far away. how can i collect the payments without them going through my emplyees first? is there a way other than through the mail? (the mail from there to here would take too long).