Leaving TCS without notice period what can be the consequences?

I have a new opportunity lined up and as I am a digital candidate there is no employment bind which was signed by my side . However the offer letter has a mention of 90 days notice period which can be bought out. I have asked my supervisor to exercise this option but he’s adamant and not letting me. Can I just leave the organisation? I have no assets except the Id card. What happens to pf account? Will my future employer know this ?