Here in the state, we use our DL as indentification. Should i drag my passport or its copy with me when in Paris at all times ? Don't want to loose it either. I am especially concern as i plan to pay with the credit card and here in the states often asked for ID. Since the CC does not have my photo ID ( i tried to add one but the microchip technology won't let me to), will i be asked for ID ? Can i use U.S. based DL or an expired passport ?