Dear Mehtajatinder,
In my opinion, it would be wise to follow the HR advice and serve the full notice period. You have to impress your future employer and seek an extension of time until the one-month period is over.
In fact, the prospective employer will appreciate your commitment to your current employer if you try to convince him that you indeed need an extension.
There is also one more dimension to it. If you tell your prospective employer that you have handled responsibilities that cannot be handed over in a jiffy and it will take time for the new person to understand and take over from you, your image with the prospective employer will go up.
Vani has indicated that Employers are in a win-win situation; they insist existing employees to leave after serving the notice period and want new employees to join almost immediately. I fully agree with you. But look at the following paragraphs:
If we look at it from the employee's perspective, sometimes they are in a win-win situation. On some occasions, you will observe that the employer would have made an offer and accepted to wait for the new employee to serve the notice period with the previous employer. But closer to the date of joining, the employer either gets information from the new employee that he is unwilling to join for some strange reasons (implying he has joined another company). The scenario here is that he submitted the resignation after receiving the offer letter from you. Simultaneously with your offer letter, he had pursued alternate jobs and was successful in locating one during the notice period he had promised you and joined the other company. The fact here is he has used the notice period he promised you and also your offer letter to get an enhancement in CTC by flashing the offer letter given by you. So eventually, this is a win-win situation for the employee as well. Honestly, this trend is on the rise now.
My suggestion to fellow HR professionals is to type out the Offer of Appointment, obtain the signature of the prospective candidate in both the employer and employee copies. Also type out an offer of appointment that does not contain any CTC figures (the offer letter will just say he has been selected for "X" position). Hand over this letter to the candidate. Tell him that he will receive the detailed letter of appointment that he signed before you on the date of his joining. (Do not even give photocopies). Tell him explicitly that you had experience in the past wherein employees had received the offer letters used it for seeking better offers.
By doing this, in my opinion, you will at least deter him from flashing the CTC letter to yet another prospective employer.
Regards,
M.V. KANNAN