The presentation serves as an introduction for learners to grasp the fundamental principles of postal security. It will cover the core components of the postal security system, drawing from the overarching stipulations outlined in the Acts of Universal Postal Union (UPU). Various tasks associated with ensuring postal security will be explained. By the end of the course, participants will have a clearer comprehension of the structure, significance, fundamental constituents, and prerequisites of postal security. Additionally, a selection of case studies derived from the designated operator's operations is included for further reading.