Ya I carried a laminated two-sided copy of the info and signature page of my passport scaled down to the size of a credit card/driver's license. Worked throughout Western Europe and Latin America for authorizing credit card purchases in person and entry into venues. Cost me $2 to make at FedEx Office/Kinkos and an employee did it all for me, since I came at an off-peak hour. Of course at official border crossings, you need the real passport.