This study examined the incidence of intentional nondisclosure by postgraduate, prelicensed counselors receiving supervision as they pursue licensure, which has not been previously examined. Examining the responses of 107 prelicensed counselors, we found that 95.3% reported withholding some degree of information from their supervisors, and 53.3% completely withheld a concern from their supervisors. Participants completely withheld supervision-related incidents (e.g., negative reactions to supervisor, questioning supervisor's competency) more frequently than they withheld client-related incidents (e.g., clinical mistakes, personal issues). We offer strategies for prelicensed counselors, supervisors, counselor educators, and counselor credentialing bodies to reduce intentional nondisclosure. These strategies include creating a collaborative environment, developing supervision contracts, and attending to power differentials in supervision.