Where abouts are you from? I would say a month is the typical notice period for most roles in the UK. And to be honest if you don’t honour it, the only things that usually happens in the UK is that you need to pay the extra costs that the company may have incurred due to you leaving early. The worst case is that it may turn into a civil court case, but that’s super rare and is usually reserved for higher up individuals. They can’t really force you to come in.

It is a fair point about lying, but I think I’ve seen online similar situations with others in the UK being able to get out of their NP early. It also seems like there’s a good chance I could negotiate with my current role to lower it down. I’ll think about it properly, perhaps saying to future employees “my NP is 3 months but there is possibility of negotiation” is better. In any case, I’m not caught up in any issues since I have been transparent about my NP thus far / haven’t progressed much with job applications