Complaint mechanisms and handling systems are interrelated with economic, financial and social benefits. As concern that these factors are applicable and important to every organization and sector, I accepted the invitation to deliver the speech on this topic under the theme "Administrative Complaint Mechanisms in ASEAN” in Siem Reap, Kingdom of Cambodia, during June 3-4, 2013. I am also pleased to share this improved version of my speech in the "Journal of Thai Ombudsman” with my sincere hope that it would be of interest to all readers.