I had joined a company in June this year. I was under probation for 6 months. At the time of joining, I was given only a general offer letter wherein nothing was mentioned about serving a notice period. I didn't receive any appointment letter until now, and I chose to resign (through email) without giving any notice period. Although the HR has accepted it, they are asking me to pay back my last earned salary. Am I bound to listen to them? Can I get a relieving letter without paying the notice pay? Can they take any legal action against me?