H1 petation is approved but not stamped


My H1 petation is approved and it is valid until 2015 ,and my current company has no projects and they are not sending me for stamping ,now iam looking for change and new company want to transer the petation ,if new company transfer the petaion will the current company will come know

I have decided to move out once every thing is fine with new company once i was stampled i will put the paper ,My concer is my current company should know this ,once i regined will they cancel my petation ,pls guide me my current comapny should not know that i have done the transfer .