The aim of the present study was to identify the causes of organizational disclosure and the reasons of unwillingness to disclose in governmental organizations that was done via sequential-explanatory mixed mode method. Participants in the qualitative part were managers and employees in public sectors among whom 75 people were selected as participants through purposeful sampling method. The statistical population of the quantitative sector included employees in governmental organizations in Semnan and 157 people were selected as samples through simple random sampling method. Analyzing the data in qualitative sector led to the identification of 32 basic themes in the context of employees’ disclosing reasons that were arranged in six organizer themes (health-centered approach, benefit-seeking approach, justice-seeking approach, ethics-oriented approach, task-oriented approach, and violent approach), and 26 basic themes about unwillingness to disclose were identified which divided into four organizer themes based on semantic similarity (organization-related factors, discloser-related factors, exposure related factors, violent-related factors). The results of the quantitative analysis show that justice-seeking, ethics-oriented, health-centered, benefit-seeking, task-oriented and violent approaches were the most important reasons for the decision to disclose respectively, and exposure related factors, organization-related factors, violent-related factors and discloser-related factors were the most important causes of being silent against observing inappropriate behaviors, respectively. The ranking of items related to the causes of disclosure indicates that the prevention of repetition of violation and feeling of injustice to oneself and sense of responsibility are considered as the most important causes of disclosure and disappointment of executive guarantee in case of disclosure of violation, high influence of the offender and lack of organizational support for exposing are considered as the main reasons for being silent against violation.