IBM licensing department
Years ago, I was the poor sod who issued a call to IBM support for one of the 1000s of products bearing the mark of "Tivoli".
Remember, when every IBM piece of SW was a Tivoli something ?
2 months later, I realised I had triggered an alarm somewhere, since a lady turned up to my office, asking to audit our Tivoli licences ...
The issue was, not only did I have 0 access to the systems, run for one of our clients, but I had also no idea nor view if we actually bought all the stuff used for this client or elsewhere.
So, the conversation went a bit cumbersome until I found out who to hand over that crap, aka, a dude who happened to be off this very day :)