Relieving Letter/Experience Letter

Hi guys,
I was working with an MNC for last 5 years. I have left the organization 1.5 months ago.
I'm trying to get my Relieving Letter/Experience Letter since then. But they haven't sent me the documents yet.
I'm planning to write a letter to the HR Director and the MD. Can anybody send me a format?
What's the legal options I have?
Thanks in advance guys...

Hello,
Did you complete your final relieving formalities like serving the notice period of the company, submitting the company properties with you etc:. If yes they have to give your relieving letter on your last working day itself. Please clarify us about the same.

Hello techiesguy,
Based on your Posting, you have at least 5 yrs experience, and that too in an MNC.
If anyone came to you with the SAME QUERY that you asked WITHOUT ANY DETAILS/BACKGROUND which Vani asked, WOULD YOU HAVE RESPONDED LET ALONE SUGGESTED WHAT TO DO?
I know this could hurt you--but the fact of the matter is: persons with such an experience level that you seem to have OUGHT NOT TO EVEN INVITE such situations where he/she is asked the queries that Vani asked. When one asks a query, it's expected that the FULL & COMPLETE & RELEVANT inputs are given while asking. Freshers/Entry-level members could be understood if they didn't.
Pl give the inputs Vani asked & I am sure many members of CiteHR would suggest well.
Rgds,
TS

Thanks for the replies guys.
I have completed all the formalities which includes submitting the company properties and notice period.
It happened because the CEO was on leave for 15 days when I left. HR promised that they will send the details to the mailing address once the CEO is back. But now they says that CEO is not signing it for some reasons.
What steps I can do in this situation?