In reply to Jeff Meredith.

the credit card terminals cant tell your using your iphone to make a payment as the iphone uses the same paypass or paywave technology to make the payment the operator can see that you are using an iphone but there is no provision in the system for them to tell the terminal its going to be an iphone transaction the terminal has no choice but to ask for a signature its up to the merchant to take the risk and accept it as the merchant is liable for signed transactions not the banks