New Employment VISA

Hi,

I came here on December 2013 on 2 years contract.  In April 2015 I gave resignation through e-mail which is accepted by written reply. Now I got a new job.  If I tell my old employer, he can create a problem, so I told I am going back to home country.  My new employer is insisting that before leaving they need my Visa cancellation documents and exit stamp on passport.  Is there any other way?  Can I apply new employment visa without the old employer knowledge.

Please help

Kindly go through this link - lmra.bh/portal/en/page/show/194#.VYLiI8-qqaV