Hi Lavnaya,
It is one of the common problems most of the companies may be facing. The moment an employee submits the resignation, he/she feels that they are now free from all the company restrictions and nobody will question them as they are leaving. This may not be the case with all the leaving employees, but a few are there who are careless and sometimes absconding. I have even seen people who work till the last moment of the last day, whatever may be the case, and sometimes support afterwards also. I feel dealing with the people who are irregular during the notice period needs counselling. Issuing a charge sheet, a show-cause notice, warning them, etc., are all things which one should be careful before practicing. The reason being it may spread bad word of mouth about the company stating various reasons which may not be true also.
My personal experience is that I have also come across such situations wherein I have personally contacted these people and counseled them to depart in a happy way. One of the important factors nowadays is employee reference check and employment verification. If you tell them about this, they will think thrice before acting funny. Even after trying all the things, if a person does not listen, then I feel instead of going into disciplinary measures, we can issue a termination notice to the person stating all the correspondence made with him.
Disciplinary actions are okay for the employees who are on the role with you and they are scared for their increments, promotions, job security, etc., but for a leaving employee, it has no value.
Hope this is in order.
Santosh