I recently flew on Singapore Airlines from Sydney to Singapore, and my boarding pass had SSCI printed on it. What does this mean? Is it in some way related to the dreaded SSSS (selected for extra security screening) at US airports?

1 Answer 1


Fortunately, the answer is rather mundane: it's short for Self-service check-in, meaning you've already checked in online but had a boarding pass reissued at the airport.

As far as I can tell this changes nothing about airport security etc, so I'm not entirely sure why this is worth recording on the boarding pass, but apparently somebody thought it was.

  • 14
    Gee, it's too bad that "SSSS" doesn't stand for "self-service security screening."
    – phoog
    Commented Nov 19, 2017 at 1:16
  • 3
    @phoog Would people be cavity-searching themselves? :)
    – Deepak
    Commented Nov 19, 2017 at 5:14
  • 1
    I think that's allowed, but you're supposed to do it in a restroom stall. Commented Nov 19, 2017 at 17:38

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