Is really depand on ur jobs industries, if ur sector very small , it might a risk as ur worry, if it is a genaral sector , don't be scare the blacklist task.

if u do the jobs very prof. , eventhough u don't want to left , the other co. also going to ask u to join there co.

It just a changer on ur jobs live, don't be afraid.

The HR is try to scare u , becouse they only do their part as they hold the position (HR). On my opinion, ur HR are not prof. as well. (did't give prof. guide & scare Boss angry).

U also can give reply or guide to who's are taking ur jobs. (e-mail / telephone). may try to stay a week to handover / settle the position stuff to ur assistant.

If u stay back in this co. , u think u can do ur jobs as normal like previous time ? ur superior may try to embarrassed u since u had submit the resignation.

Just paid as requirement & handover whichever stuff & let ur boss understand ur status, they will agree & let u go.