I can't find a place where I'm asked for the iMac's serial number. But I probably should have written it down the last time I booted (see the update about me finally being able to boot an old iMac.)

I'm going to laugh my a* off if they try to tell me the serial number they have associated with my AppleId is the 20 year old G5 iMac they admitted died due to a design flaw and they were responsible for replacing but then refused to replace because I bought it from a reseller that had since gone out of business.

But thx for the references. I probably need to spend a little more time digging through them.