I am actually going through this right now. I'm in a position that renews yearly. I'm a regular employee but it's the way this kind of position works (I'm being a little vague on purpose to avoid personal identification). Before renewal I talked to the officer manager, he sent everything over to HR a few weeks early.... which seems to be the mistake.

HR let it sit on their desk and then forgot. My office manager is working at getting them to fix it ASAP. I've already missed one paycheck (which I will receive eventually).

First hint was a notice that I am going to be losing email access soon (which I still have currently). Then I lost keycard access to the building and office (it unlocks automatically at a set time, so I can still get in eventually). I've lost access to some of the resources we have (not critical to my job at this point). Got a letter in the mail about COBRA. Got a letter in the mail about retirement. I'm wondering when I will lose access to our wifi and cluster.