Left company during notice period

You have resigned from company on 15 thby giving letter or by email.Are you having acknowldgement?Assuming you are able to prove resignation was submitted on 15th then on 28th you have returned laptop I card till then any pending technical work was discussed?whether company has given you leter/email that you have not completed assignment you can not leave middle of assignment?If not then it is good defence.If you are able to prove that (1)you have resigned showing acknowledgement or email (2)you are ready to pay balance amount(3)you have no pending assignment then you need not worry.convince your present employer showing resignation tendered.If previous company gives notice then take your advocates advice to fight out on above ground. 

Thanks a lot Ahmed.

For (1) I have forwarded the mail which I sent to my Manager to my personnel email Id. 

Also his reply that you need to serve 3 months ending 15 feb.

For (2) On my mail on 28 th dec I clearly mentioned this.

For(3)..Here I am at back foot.  My manager cleverly wrote a mail to me where on 15 Dec he assigned me new work and wrote that you need to finish this before leaving. But I responded back saying this is all new work.

So I dont have a proof for (3).

What legal notice can they send and what can be implications and

Is there a way I can get my documents.

I don't think company might have given any acceptance on resignation letter.

No they have not given any acceptance.They only said, serve 3 months notice before you leave.

Same case of mine. I have tendered my resignation but none of the officer of company accepted this. Dear friend , I request you to suggest me what action should be taken on following situation:-

1. As per my appointment letter company is deducting 10% retention pay of my CTC for one year.

2. Even after completion of one year company has not refunded me retention amount which should be refunded after completion.

3. Can company extend retention amount deduction? I mean can company change original appointment letter with its own interest?  

4.. After giving resignation company is asking to pay three month notice pay on CTC amount.

5..Can company ask Notice pay ? when company is deducting retention pay. 

Can company do such harrassment activities?

Same case of mine. I have tendered my resignation but none of the officer of company accepted this. Dear friend , I request you to suggest me what action should be taken on following situation:-

1. As per my appointment letter company is deducting 10% retention pay of my CTC for one year.

2. Even after completion of one year company has not refunded me retention amount which should be refunded after completion.

3. Can company extend retention amount deduction? I mean can company change original appointment letter with its own interest?  

4.. After giving resignation company is asking to pay three month notice pay on CTC amount.

5..Can company ask Notice pay ? when company is deducting retention pay. 

Can company do such harrassment activities?

PLEASE HELP ME OUT.