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This 7-digit Code Could Save You From Extra Airport Security Screenings on Every Trip

No, not every traveler needs one — but here's how to find out if you do.

<p>Carlina Teteris/Getty Images</p>

Carlina Teteris/Getty Images

When you book a flight online, there's quite a bit of information you need to provide, from your email and phone number to your frequent flier number if you have one to your credit card details. It's fairly obvious as to what most of this is, but there's one piece that sometimes confuses travelers: a redress number. So, what is a redress number, and do you need one to travel? Here's what you need to know.

What is a redress number?

A redress number, formally called a Redress Control Number, is issued to travelers who are part of the Department of Homeland Security's Traveler Redress Inquiry Program (DHS TRIP). It's used to help travelers alleviate recurring security issues, whether they're regularly selected for secondary screening or have issues at the U.S. border. A redress number alerts the Transportation Security Administration (TSA) that a traveler may be incorrectly added to a security watch list, which happens on occasion.

Do you need a redress number to travel?