I have been working for 4 years in a company. However, my working visa is expired for more than a month now. Sent reminders to HR and I was advised it will be processed but nothing has been done so far till date. I recently received an offer letter from another company, submitted my resignation requesting for 2 weeks' notice. But I was told by HR, it should 30 days. Should I still serve notice period to my employer when my work visa is expired and no solid assurance when or if it will be renewed? Appreciate your clarification in this regard. Thanks