Surely you can scan it via your smartphone? Saves all the hassle with creased paper ffs!!!
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On the ticket it says "This ticket must be printed individually on one full sheet of A4 paper. The barcode will not scan at the turnstile if this ticket is printed in a smaller size". I am assuming from that statement that it would be risky to rely on a smartphone to enter the Amex on Monday. I agree though that it should work. I always use my the Q scanner thingy on my phone to show my ticket at the cinema.