/bæk ˈtaɪtl ˈlɛtər/ – Phrase
Definition: Thư ký tiêu đề.
A more thorough explanation: a formal letter from a company that insures the formal right of ownership to real estate and provides information about the status of the right concerning a particular piece of land from a particular date
Example: He received the back-title letter on Friday and didn’t start to examine the title until Monday.