Patient safety enhancement, learning from events and errors, providing feedback to health care workers and confidentiality were four basic principles of the system that have been emphasized. Root cause analysis of reported events and other safety information and dissemination of results have met such important issues. Providing feedback has been done through safety alerts, presentation of notable cases in safety boards, and official informing of mentioned solutions to target groups. There were many problems in providing feedback. First, disseminating information in way that didn’t cause sham and blame and lead to disclosure of confidential data, needed to expert staff for providing reports, newsletters or alerts. Besides, high workload of most staff and large amount of documentation tasks have caused that patient safety alerts not to be listened. In order to overcome these problems, safety walkrounds with senior management was organized to emphasize on patient safety issues and its documents.