Why wouldn't you accept checks? Just be sure to get positivie ID. Your employee should copy the drivers license number on to each check you accepts so that if there is a problem, law enforcement will prosecute.
BTW, back in the 80's, my father had a sign at his office that said, "RETURN CHECK CHARGE $1500". That isn't even legal in Indiana. It was a joke. You would be surprised at the number of people who would get their checkbooks out to pay, start writting their checks, look up and see that sign, then put their checkbooks away and pay cash!