I am working in my present company from last 1.8 years. My Contract with the company are already ended. Now I am switching to other company. In my contract my notice period is of 90 days. But as my contract is already over so , I provided notice period of 30 days. This Is already informed to my manager, and he provided an verbal confirmation . But just before 10 days of my reliving my manager had provided an official acceptance with 60 days notice period. So, What should I do?