UK passengers flying to or from the United States may encounter a four-letter code on their boarding pass that signals additional security screening. The code SSSS, which stands for Secondary Security Screening Selection or Secondary Security Screening Selectee, indicates that a passenger has been chosen for enhanced inspection.
What Triggers the SSSS Code?
The Transportation Security Administration (TSA) does not disclose the exact criteria for flagging passengers, but several factors can increase the likelihood. Citizens of countries with sanctions or political tensions with the USA may be more prone to receiving the code. Other triggers include one-way bookings, purchasing tickets with cash, previous travel through high-risk countries, frequent visits to unusual destinations, or having a name similar to someone on a Department of Homeland Security watch list.
How Airlines Indicate Extra Screening
While many airlines print SSSS on boarding passes, some use alternative methods. For instance, Southwest Airlines reportedly uses a chequerboard pattern to flag passengers requiring additional screening.
What to Expect During Secondary Screening
If you see SSSS on your boarding pass, you will likely undergo an enhanced pat-down, a manual inspection of carry-on bags, and possibly a handheld metal detector scan. Passengers should plan for extra time at security checkpoints.
How to Avoid Repeated Flagging
Passengers who are repeatedly selected for extra screening can apply for the DHS Traveler Redress Inquiry Program (DHS TRIP). If approved, they receive a Redress Control Number to use when booking flights, which should reduce future incidents.
Advice for Travellers
The ACLU previously stated that the TSA maintains a "Selectee List" of individuals automatically selected for enhanced screening on every flight. However, the TSA advises passengers to arrive at least two hours before domestic flights and three hours before international departures in the USA to accommodate any additional checks.
