Cheshire Figment is the resident expert, I am just nodding my head YES to what he wrote.
That scanner hates my fingers! I am missing several fingers and for the last 4 trips I did not know that signing my card and handing my ID to the person would make all the diffficulties go away. Finally, after me nearly crying at the turnstile, the CM told my traveling companion just what Cheshire wrote above.
(I was 20 feet away trying to fight back tears. The CM had been less than understanding, in her insistance that I needed to scan my finger. It was only after I was through that she realized the issue needed a solution, so she offered it to my friends.)
It worked very well the remainder of the trip! I did not have to hold up my hands in the air to SHOW my problem, I did not have to scan and re-scan only to have the thing reject every time, and I did not have to insist they push me through when they are trained not to. The ID+Ticket works for anyone who does not want to be scanned, for ANY reason. As long as the ID matches the ticket they smile, push a button, run my ticket and I am on my way. I no longer had to be the "different" one.
I wish I had asked this same question 4 trips ago!!! Have a great time!!!!