ACKOWLEDGEMENT To Teacher in Dong Nai university To director and all staff at Trang Bom post office First of all, I would like to express my deepest gratitude to teachers’ guide, friend and family’s care in the past three years I am grateful to you for your help and transfer of precious experience, which will prepare us for knowledge to get to the life Especially, I would like to express my gratitude to Mr Nguyen Van Nam – my guide teacher who teaches and supports me a lot during my internship Finally, I want to take this opportunity to say thank to director of Trang Bom post office, Ms Thanh- transaction leader, Ms Luan, Ms Yen, Ms Huong , and Ms Duc – my supervisors and all staff in Trang Bom post office Thank you very much for your kind cooperation during my internship