I worked with this company for one week. Due to some family issues, I had to resign, but I wasn't able to serve the notice period of two months. As a result, they didn't give me any relieving letter. However, they haven't even given me any appointment letter. I only signed some terms and conditions, which don't mention anything about the notice period. I talked to HR and mailed my resignation, but they didn't reply to it. Can they sue me for not serving the notice period?