Bowling Green, Ky – As unemployment rates increase, millions of Americans are looking for work. An effective letter of reference can be a key part of the search process. But some companies and organizations no longer want their employees writing such letters on company stationary. Dan Modlin spoke with Cheryl Lewis-Smith, the WKU Human Resources Manager for Employment and Training. She says many companies now prefer that supervisors write what's known as a "letter of appreciation" when an employee leaves.