IMO don't stick your nose where it don't belong. As Danso said, you could mention it to the person which the person in question reports to, and I would do so w

IMO don't stick your nose where it don't belong. As Danso said, you could mention it to the person which the person in question reports to, and I would do so with caution and vagueness. You don't want to be seen as micromanaging someone elses department.