I've worked for Apple, and I've worked for a couple banks, and my first advice always is:
Whenever you get something that seems scammy, don't call a number that you received. Whether that's a number on a bank draft, or the number on caller ID, don't use it. Find a trusted source, in this case
www.apple.com, and call the number listed there.
Yeah. It’s called a CRU. It’s a pretty standard process; but a call out of the blue isn’t.
It sounds like the
@thewall may have had it in for service or at least called about service earlier. That can and does occasionally lead to an "engineering capture", where Apple wants the device back for additional research.
Sometimes it can be safety related, so I wouldn't ignore this.
Engineering captures are rare, but do happen. That process often runs alongside the CRU process, but it isn't an A=B thing.
What I would recommend is that
@thewall call
1-800–692–7753 and get through to AppleCare, have them look up his serial number and see if the notes match what the caller told him.
AppleCare chat would be able to help as well, they're available here:
https://getsupport.apple.com/topics