A social worker licensed under the provisions of this chapter, upon payment of the prescribed fee, may use the title appearing on his license and the corresponding letters ("LBSW" for "Licensed Baccalaureate Social Worker"; "LMSW" for "Licensed Master Social Worker"; or "LISW" for "Licensed Independent Social Worker") following his name, unless the license has been revoked or suspended or has lapsed. Every person to whom a license is issued shall display the license in a prominent place in his office or place of employment.