Open testing and test disclosure legislation has fostered a renewed interest in the problems and issues associated with test equating. This paper focuses on a specific application of test equating, that of professional and occupational testing for certification and licensure. Test equating is the process of making test scores from different forms of the same test comparable. The role of test equating in the credentialing examination process, its usefulness for maintaining consistent standards, and monitoring performance trends across time are discussed. The issues which must be considered when implementing test equating in a credentialing examination program are described. Issues are considered as test development or technical concerns. This paper is designed to provide information for credentialing board members who hold the major responsibility for preparing, administering, and scoring credentialing examinations, as well as non-technical persons involved in the credentialing process. (Author/DWH)