Are you the landlord? Do you have a contract with the renter and verbal? How long has it been since they last paid rent? You can attempt to collect through Small Claims Court, but I would suggest contacting the courts and ask what is the proper steps. The amount must be less than $5,000.
You could also contact a collection agency, but do find out what the cost will be for you. I would suggest google search for collection agency in Durham.....many were listed.