Required, no. But call it dual control, quality control or damage control it is an excellent way to keep your fingers on the pulse of your customers. What they don't like, what they have real issues with and assurance that when there is a real problem, it isn't ignored.
These have CRA implications as well as others and can be VERY important. I recommend a good policy/procedure be in place.
And my contribution to that article was minor.
As to my composure, I think they may be coming to take me away, ho ho, he he, ha ha... Things are nuts until next week, or June, possibly October. I'm working on it though.