I started a new job early November. Unfortunately after two weeks I was offered something else which suited me much much better (miles closer to home, cutting down commute by 3 hours a day for the same money) and so I felt I really had no choice but to accept.
I only needed to give a week's notice and when I told them I was leaving they said okay, they were disappointed etc. they sat me on a desk away from everyone and left me with nothing to do until 5pm 
At around 5 to 5 I got an email saying 'there is no requirement for you to come into the office to work your notice period as discussed'. I hadn't discussed it with anyone, as far as I was aware I was supposed to be coming in the following week to work which I was happy to do but their email told me there was no need.
At 5 a lady I didn't know came and took my pass for the doors off me and that was it.
I've been paid today and it seems they haven't paid me for my notice week.
I don't know whether I can be annoyed, to me their email implied that my notice week still applied but I just didn't need to come in. I understand it wasn't great of me to leave a new job so soon but I would have happily worked the following week if they had wanted me to/let me. At no point did I say I wouldn't.
I know I should have questioned it at the time but as I say, they sat me away from everyone and only told me nearing 5pm that I wasn't needed the following week. When I went to find my manager at 5 she'd already left and frankly I wanted to get out of there as it was awkward as hell. Clearly they took it very personally.
I'm guessing I just need to chalk this one up to experience and learn to question things next time? I can't help but be a but pissed though, so close to Christmas and I'm now down hundreds of pounds.