I think it's only certain departments.
They started that at least a year ago and they made an announcement, but then we never hear about it, except the couple of times it still happens to a boardie etc.
So presumably, and I don't think that it's the receiving team, as I don't believe I've had books checked in over the weekend. Books already there and marked received, yes.
Also it appears they've had some of the in house signings on the weekend, according to Facebook.
Now pressing, that's a whole different ball game that I'd be curious if it happens
Then maybe they would go to received, only way to know, on the weekend.