I have recently joined a new organization and am currently in the probation period. I have completed 3 months of the probation period, with 3 months still remaining. I have decided to resign with a 30-day notice period. However, my HR is insisting that I serve a 90-day notice period. This requirement is not mentioned anywhere in my appointment letter regarding the probation period. The appointment letter clearly states, "it is mandatory to serve a 90-day notice period after employment confirmation." Since I am still in the probation period, this clause should not apply to me. My HR is threatening that my resignation will be treated as absconding.
What should I do?
What should I do?