Can college sue graduated student for debts tuition fees?

Yes, a college can sue a graduated student for unpaid tuition fees. The college has a legal right to pursue collection of debts owed to them. They can pursue various methods, including sending the debt to collections, obtaining a judgment against the student in court, and potentially garnishing wages or seizing assets. The specific legal avenues available will depend on the location (state and country) and the details of the agreement between the student and the college.