“SSSS” on a boarding pass stands for Secondary Security Screening Selection.

1. At check-in or the gate
She may not be able to check in fully online.
The airline staff might mark her boarding pass again or direct her to security.
Sometimes the SSSS is only noticed at the gate, not earlier.
2. At the security checkpoint
This is where the extra screening happens:

a. Identity verification

They’ll double-check her passport and boarding pass carefully.
May ask basic questions (destination, purpose of travel, etc.).
b. Carry-on bag inspection

Her bags will be opened and examined item-by-item.
Electronics (phone, laptop, chargers) may be turned on or checked.
c. Physical screening

A more thorough pat-down than usual.
Shoes, jacket, and accessories will likely be checked separately.
d. Explosives trace test

They may swab her hands, belongings, or clothing.
The swab is put into a machine to check for trace substances.
3. Time impact
Usually adds 10–30 minutes, but occasionally longer.
That’s why airlines recommend arriving early if this happens.

🤔 Why it happens
continued on the next page

 

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