Can a resignation be revoked if submitted under duress?
I submitted my resignation on 05/22 under duress. On 05/26 I was submitted to a psychiatric care institution for 10 days, diagnosed as bipolar, and released with medication. Can I claim a severance pay or can we revoke my resignation?
You should consult with an employment attorney. You say you resigned "under duress"--what kind of "duress"? Some kinds may be actionable, as when the employer threatened actions that would themselves be actionable, such as threatening to withhold money legitimately owed you, or threatening to defame you publically or disclose private information. On the other hand, the fairly common "If you don't resign, we'll fire you" is not actionable, since the employee can simply choose to be fired in that circumstance, and there there is nothing illegal about an employer terminating an employee or, in the process, choosing to give him or her a more graceful out.
Also, it is possible that if your psychiatric condition would qualify as a disabilty at the time, that it would have been improper for an employer to take any sort of action against you. That's why you should consult with an employment attorney, to see if under the full, detailed circumstances, you have a cause of action.