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TomMM I'll chalk it up to coincidence, the last time I had SSSS on a connecting inbound from the Dominican Republic prior to the most recent one, I had one of the most intensive CBP secondary screenings ever done, but nothing more happened on my onward connecting flight from MIA.
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OTD, I didn't see any kiosks in the terminal (I was in transit, post-security), except there was a staffed counter where anyone going on to the US on AA in terminal 3 had to pass through. I tried the app just before take off and I got a message that no boarding pass was available but no message about getting a copy from a counter. I had already boarded by then. It seems that its not unusual based on MissJ's response, just odd that its handwritten.