/meɪl-bɒks (ˈmeɪlɪŋ) ˈθiːəri/ – Phrase
Definition: nguyên lý “hộp thư” (hợp đồng được xem là đã được ký kết từ thời điểm gửi qua bưu điện thông báo chấp nhận bán chào hàng).
A more thorough explanation: The “mailbox rule” or “mailing rule” is a legal principle that governs the timing of acceptance of a contract sent through the mail. According to this rule, an acceptance sent through the mail is considered effective as soon as it is posted, rather than when it is received by the offeror. This rule applies to contracts that are formed through correspondence by mail, and it is based on the idea that the offeror takes the risk of delays or losses in the postal system.
Example: Suppose Party A offers to sell goods to Party B and specifies that Party B must accept the offer by mail. Party B sends the acceptance letter via mail on July 1st. According to the mail-box theory, the acceptance is considered effective on July 1st, the date it was sent, even if Party A does not receive it until July 5th.