[rnprince]

Three months is aggressive and not standard. This is a red flag in my book. To me it means that very ugly situations come up in the company, and they feel the need to lessen your ability to respond appropriately to them.

There is no good reason for them not giving you the offer they promised you. This is the first of many times this company is likely to take advantage of you. At this point I'd consider walking away even if they did manage to correct the offer.

[richardknop]

To be honest though, notice period is not really something that can be enforced. Your contract might say 3 months but if you get annoyed you can just leave office one day and not come back. I don't think there's anything a company can do if you just walk away.

[rnprince]

It depends on how they enforce it. One of my former employers would pay out unused vacation days under vaguely defined terms of being in good standing with the company, which I understood to mean that you have to give them the full notice period that they asked for. In a lot of states I think it isn't allowed to not pay out unused vacation days, but I'm sure other things could be done to enforce the three-month policy.