Regarding my cancellation of H1b By Employeer


I got my petition in 2013,and got opportunity to travel in 2014-2015 for 1 year.In august 2016 My petition got expired.Now in Sep 2016 my employeer applied for renewl.But now in Dec 2016 i am leaving my organisation and joining in new organisation in India. My current Employeer(older who had applied) is asking for original petition for Cancellation,So how can i avoid it for cancellation or how it will affect me if my new empolyeer will try to renew or transfer my H1B in future.Can my new employeer use older petition referece number to apply in cap exempt.I have make copies of Petition for future use.

Please help me on this.

Thank You

Rajeev Ranjan