immediate discharge. Whether or not the union sent the letter to the company, and whether or not the company un-
derstood the letter to be a request to fire Mr. Lopez immediately, see supra note 1, there is no question that the letter
had the reasonable tendency to cause an employee to fear that possibility. And a Section 8(b)(1)(A) violation arises
suggesting the union did just the opposite-first agreeing to a payment schedule with Mr. Lopez on November 13,
and then having him fired the next day, before he could complete the agreed schedule and while he was on track to
do so. Though some of this evidence is disputed, we cannot say that a “reasonable mind” had to reject it. And ac–
cepting this evidence leads unavoidably to the conclusion that the union violated both Section 8(b)(1)(A)’s prohibi–
tion against unduly restraining or coercing employees, as well as Section 8(b)(2)’s prohibition against causing an
First, the ALJ credited Mr. Lopez’s testimony that he did not receive the October 12 letter and, the ALJ held, the
union could not have discharged its fiduciary duties to him by means of a letter he never received. The union asks us
to overturn the ALJ’s factual finding, insisting that Mr. Lopez must have received the October 12 letter because it
affixed appropriate postage to the letter, properly addressed it to Mr. Lopez, and placed it in the United States mail.
placed in the United States mail normally arrive where they are directed because of the “probability that the officers
of the [postal service] will do their duty.” Rosenthal v. Walker, 111 U.S. 185, 193, 4 S.Ct. 382, 28 L.Ed. 395 (1884).
Even in 1884, when the Supreme Court decided Rosenthal, no one claimed perfection for the post office and the
“mailbox rule” was and never has been more than a presumption that may be rebutted by other evidence suggesting
that the addressee did not receive the letter. See id. at 193-94, 4 S.Ct. 382.
Lopez’s testimony that he hadn‘t received the letter, explained his reasons for doing so, and the Board adopted the
ALJ’s determination as its own. The record, moreover, contains other evidence supporting Mr. Lopez’s sworn testi-
mony that he didn’t receive the October 12 letter-perhaps most notably that he took no action after the October 12
letter but acted immediately after receiving the substantially similar November 1 letter.