When navigating airport screening and security, you may come across terms like ‘Known Traveler Number’ and ‘Redress Number.’ But what do they mean and how are they different? This comprehensive guide explains everything you need to know about Known Traveler Numbers and Redress Numbers for air travel.

If you’re short on time, here’s the quick overview: A Known Traveler Number (KTN) gives you access to expedited screening through TSA PreCheck. A Redress Number helps resolve misidentifications for travelers who get extra screening.

What is a Known Traveler Number?

A Known Traveler Number (KTN) is a unique identification number that is issued to pre-approved travelers by the Transportation Security Administration (TSA) in the United States. It is part of the TSA’s PreCheck program, which is designed to expedite the security screening process for eligible passengers.

Definition and purpose of KTNs

A KTN is essentially a way for the TSA to identify travelers who have undergone a thorough background check and are considered low-risk. By providing their KTN when making a flight reservation, these travelers are granted access to the PreCheck security lanes at participating airports.

This means they can enjoy benefits such as keeping their shoes and belts on, leaving laptops and liquids in their bags, and going through a faster and less intrusive screening process.

The purpose of the KTN is to enhance security while also improving the travel experience for eligible passengers. It allows the TSA to focus their resources on passengers who may pose a higher risk, while providing a more streamlined process for those who have already been vetted.

Who is eligible and how to enroll

Not everyone is eligible for a KTN. To qualify, individuals must meet certain criteria, including being a U.S. citizen or lawful permanent resident, having no disqualifying criminal offenses, and not being on any terrorist watchlists.

Travelers can apply for a KTN by enrolling in the TSA PreCheck program, which involves completing an online application, paying a fee, and scheduling an in-person appointment at an enrollment center to verify their identity and provide fingerprints.

It is important to note that a KTN is only valid for five years, after which travelers will need to go through the renewal process to maintain their PreCheck benefits.

Programs that utilize Known Traveler Numbers

While the TSA PreCheck program is perhaps the most well-known use of KTNs, there are other programs and initiatives that also utilize these identification numbers. For example, the Global Entry program, administered by U.S. Customs and Border Protection, allows pre-approved, low-risk travelers expedited clearance when entering the United States.

Travelers enrolled in Global Entry receive a Known Traveler Number that can be used in conjunction with the TSA PreCheck program.

Additionally, some airline frequent flyer programs offer expedited screening benefits to their elite status members. These programs may also require a KTN to be provided in order to access the expedited security lanes.

What is a Redress Number?

A Redress Number is a unique identifier assigned to individuals who have faced difficulties or experienced issues during their travels. It is a system implemented by the Department of Homeland Security (DHS) to help streamline the travel process for individuals who may have been mistakenly flagged or have encountered recurring problems.

Definition and purpose of Redress Numbers

A Redress Number serves as a way to distinguish travelers from individuals with similar names who may be on watch lists or have security concerns. It provides a means for travelers to resolve issues they may face, such as being consistently selected for additional screening or being denied boarding without a valid reason.

The purpose of a Redress Number is to prevent innocent individuals from being inconvenienced or falsely flagged as potential security threats. By providing a unique identifier, it allows government agencies, such as the Transportation Security Administration (TSA), to quickly verify a traveler’s identity and ensure a smoother travel experience.

Reasons travelers may need a Redress Number

There are several reasons why a traveler may need a Redress Number. One common scenario is when an individual shares a name or a similar name with someone who is on a watch list or has a history of security concerns. This can lead to frequent and unnecessary screening procedures.

Another reason is when a traveler consistently encounters difficulties or delays during the travel process, without a clear explanation. This could include being denied boarding, receiving secondary screenings, or facing other inconveniences.

In such cases, having a Redress Number can help resolve these issues and prevent future occurrences.

Applying for a Redress Number with DHS TRIP

To apply for a Redress Number, travelers can utilize the DHS Traveler Redress Inquiry Program (DHS TRIP). This program allows individuals to submit their travel-related concerns and request a Redress Number for future reference.

The online application process requires individuals to provide personal information, travel details, and any relevant documentation to support their case. It is important to provide as much accurate information as possible to expedite the review process.

Once the application is submitted, the DHS will review the case and assign a Redress Number if deemed necessary. This number can then be used during future travels to help prevent unnecessary inconveniences and ensure a smoother travel experience.

For more information on applying for a Redress Number and the DHS TRIP program, visit the official Department of Homeland Security website: https://www.dhs.gov/dhs-trip

Key Differences Between KTN and Redress

KTN for expedited screening; Redress to resolve issues

One of the main differences between Known Traveler Number (KTN) and Redress Number is their purpose. KTN is primarily used for expedited screening, allowing travelers to enjoy a faster and more convenient airport experience.

By providing their KTN during the booking process, travelers can take advantage of programs such as TSA PreCheck or Global Entry, which offer benefits like shorter security lines and not having to remove shoes or laptops during screening.

On the other hand, Redress Number is designed to help individuals who have experienced repeated difficulties or delays during travel due to mistaken identity or a similar issue. It is a way for these individuals to resolve problems and ensure smoother travel in the future.

KTN requires enrollment; Redress for those with problems

Another key difference between KTN and Redress Number lies in their eligibility requirements. KTN requires travelers to enroll in a trusted traveler program, such as TSA PreCheck or Global Entry. These programs typically involve a background check and an in-person interview.

Once approved, travelers are assigned a unique 9-digit KTN that they can use when making travel reservations. In contrast, Redress Number is meant for individuals who have encountered recurring issues during travel, such as being consistently flagged for additional screening or being mistakenly identified as a security risk.

Those with ongoing problems can apply for a Redress Number through the Department of Homeland Security’s Travel Redress Inquiry Program (DHS TRIP).

KTN is 9-digits; Redress is 10-digits

The length of the identification numbers is also a distinguishing factor between KTN and Redress Number. KTN consists of a 9-digit code, while Redress Number is composed of 10 digits. The unique combination of digits in each number helps to differentiate individuals and ensure accurate identification during the travel process.

Using Your KTN and Redress Number When Flying

When it comes to flying, having a Known Traveler Number (KTN) or a Redress Number can make your travel experience smoother and more efficient. While both numbers serve a similar purpose, there are some key differences between them.

Understanding how to use your KTN and Redress Number can help you navigate through airport security with ease.

Adding KTN to flight bookings for TSA PreCheck

If you are a frequent traveler and want to breeze through airport security, adding your KTN to your flight bookings is essential. The KTN is a unique identification number that is associated with your TSA PreCheck membership.

TSA PreCheck allows you to enjoy expedited screening, where you can keep your shoes on, leave your laptop in your bag, and avoid the hassle of removing your liquids and belts. By adding your KTN to your flight bookings, you can ensure that you receive the benefits of TSA PreCheck every time you fly.

To add your KTN to your flight bookings, simply enter the number during the online check-in process or provide it to the airline agent when checking in at the airport. Once your KTN is associated with your reservation, you should see the TSA PreCheck indicator on your boarding pass, allowing you to enjoy the perks of expedited screening.

Carrying Redress Number if extra screening likely

If you have ever experienced additional screening or encountered issues while traveling, obtaining a Redress Number can help minimize these inconveniences. The Redress Number is provided by the Department of Homeland Security (DHS) and is intended for travelers who have consistently faced challenges due to mistaken identity or watchlist matches.

Carrying your Redress Number is particularly important if you have been flagged for additional screening in the past. This number serves as a way to alert security personnel that you have been cleared and have undergone the necessary vetting procedures.

By providing your Redress Number, you can help prevent delays and ensure a smoother travel experience.

To obtain a Redress Number, you can apply through the DHS Traveler Redress Inquiry Program (TRIP) website. The application process is straightforward, and once you receive your Redress Number, make sure to keep it handy whenever you travel.

Frequently Asked Questions

Can I use both a KTN and Redress Number?

Yes, it is possible to have both a Known Traveler Number (KTN) and a Redress Number. However, it is important to understand the difference between the two and when to use each one.

A KTN is a unique identification number assigned to individuals who have been approved for the TSA PreCheck program. It allows them to enjoy expedited security screening at participating airports in the United States.

On the other hand, a Redress Number is a unique identification number assigned to individuals who have experienced difficulties or inconveniences during the travel screening process.

If you have both a KTN and a Redress Number, it is recommended to use your KTN whenever possible, as it provides the added benefit of expedited security screening. However, if you encounter any issues or have experienced difficulties in the past, you may also provide your Redress Number to ensure a smoother travel experience.

What if I lost my KTN or Redress Number?

If you have lost your Known Traveler Number or Redress Number, don’t panic. There are steps you can take to retrieve them.

If you have a KTN and have lost it, you can visit the TSA PreCheck website and enter your personal information to retrieve your KTN. Alternatively, you can contact the TSA directly for assistance.

If you have a Redress Number and have lost it, you can contact the Department of Homeland Security’s Travel Redress Inquiry Program (DHS TRIP) for assistance in retrieving your Redress Number.

It is important to keep track of your KTN and Redress Number, as they can greatly simplify your travel experience and help resolve any issues that may arise during the screening process.

Who needs each type of number?

The need for a Known Traveler Number (KTN) or Redress Number depends on the individual’s travel requirements and experiences.

Individuals who frequently travel within the United States and wish to enjoy expedited security screening can apply for a KTN. This is particularly beneficial for frequent flyers or business travelers who want to save time and avoid the hassle of long security lines.

On the other hand, individuals who have experienced difficulties or inconveniences during the travel screening process, such as being mistaken for someone on a watchlist or facing additional scrutiny, may benefit from obtaining a Redress Number.

This number acts as a way to resolve any recurring issues and streamline the travel experience.

It is important to note that the need for a KTN or Redress Number may vary from person to person. It is recommended to assess your travel needs and experiences to determine which type of number would be most beneficial for you.


Understanding the difference between a Known Traveler Number and Redress Number is key for smoothing your way through airport security. KTNs provide access to faster screening for approved travelers, while Redress Numbers help resolve recurrent issues if you get flagged for extra screening.

Having clarity on how to use these numbers makes air travel much less stressful.

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