I was a contractor and was let go with less than an hours notice. I also missed the meeting I had with them where they would inform so when I came back from lunch wasn't able to login to anything. Luckily I had the number to one of my colleagues and I was able to get a hold of somebody through those channels. That being said I didn't get to say goodbye to some of my coworkers.
* I'm in IT though so for security purposes I understand.