not true for fiat your thinking of code one keys that can be duplicated made and programed with ease
not code 2 rolling code it's impossible
there is the cars code required there is a code within the fiat examiner required then you need the can interface hardware software a means to get hold of roiling code key chips ad keys then you need a code from the body computer to put on the key for the car to except it as one of it's keys then you need to give the key another code and the car simultaneously to start of the rolling mathematical code sequence whilst not losing any other keys from the ecu
you have heard complete rubish
if it was posible i would be the first to tell of a loop hole to the system but it's just too tight
so wrong mate . as an auto locksmith i am making keys for these vehicles almost on a daily basis , soon i hope to do by post ,once i set a rig up on my bench . i dont know if you work for fiat but if you do please dont beleive what your being told . to tell someone they have heard complete rubbish is well out of order .