I have joined x organization n months back. After accepting Offer, I received mail to sign paper stating "In service training and certification bond" (included payment of huge amount as training cost(15L) if leave org within 18 months). I called HR and told that I am not ready to sign any bond. He convinced me that "This is just a paper not bond(Stamp paper) which makes you liable to company, we won't ask you any money even you leave, it is just formality to get into project" . I trusted him and signed on it as it is not Bond Paper. I resigned now and they are not releasing me showing that agreement. The HR and everyone changed words and not helping me in any way. My Notice period is ending soon and They are threatening like "you won't get any documents from us if you won't pay". Any guidance is highly appreciated.