I work for an American company and we recently had some people affected by layoffs. One of them was reporting to me, and we had pretty much the opposite policy from the company above, which was that I wasn't allowed to mention to his teammates that him leaving was part of the layoff, unless he chose to make it public first.

That introduced an interesting dynamic because as you'd expect, he told everyone right away, but I couldn't talk about it with the team (or even probe to see who knew) until about a month later when someone 'leaked' to me that everyone already knew.