Introduction
Whether you’re an avid traveler or just looking for an easier way to get through airport security, you may have heard of known traveler numbers. But do you know what they are and why they expire? In this article, we’ll explore the shelf life of known traveler numbers and answer all the questions you may have about them.

Exploring the Expiration of Known Traveler Numbers
A known traveler number (KTN) is a unique code assigned to travelers who have completed a background check and enrolled in one of the U.S. government’s trusted traveler programs. These programs allow travelers to receive expedited screening at airports and other ports of entry. KTNs are valid for five years, after which they must be renewed. Here’s what you need to know about them.

A Guide to the Shelf Life of Known Traveler Numbers
Known traveler numbers are issued for a period of five years. After that time, they will expire and must be renewed. When you apply for a KTN, you will be asked to provide your full name, date of birth, address, and other identifying information. Once you have provided this information, your application will be processed and you will be issued a KTN. You should keep this number handy, as you will need it every time you travel.
Don’t Let Your Known Traveler Number Expire: Here’s What You Need to Know
It is important to remember that your known traveler number will expire after five years. If you want to continue to enjoy the benefits of the trusted traveler program, you will need to reapply before the expiration date. To do so, you will need to submit a new application with updated information. The process of applying for a renewal is generally the same as applying for the first time, but you may be required to provide additional documents or information.
How Long Is a Known Traveler Number Valid For?
As mentioned above, known traveler numbers are valid for five years. However, some programs may require you to renew your KTN more frequently. For example, the TSA PreCheck program requires travelers to renew their membership every five years, while the Global Entry program requires travelers to renew their membership every four years. It is important to check the requirements of your chosen program to ensure that your KTN remains valid.
Understanding When and Why Known Traveler Numbers Expire
Knowing when your known traveler number is set to expire is important. It allows you to plan ahead and make sure you have enough time to renew it before it expires. Most programs will send you an email or letter reminding you to renew your KTN before it expires. It is also important to understand why KTNs expire. This is because the U.S. government wants to ensure that only those who have been vetted through the background check process have access to the trusted traveler programs.
Do You Need to Renew Your Known Traveler Number?
Yes, you do need to renew your known traveler number. As mentioned above, most programs will require you to renew your KTN every five years. However, some programs may require you to renew more frequently. It is important to check the requirements of your chosen program to ensure that your KTN remains valid. Additionally, if your personal information changes, such as your address or passport number, you may need to update your KTN.
What Happens if Your Known Traveler Number Expires?
If your known traveler number expires, you will no longer be able to take advantage of the benefits associated with the trusted traveler program. This includes expedited screening at airports and other ports of entry. Additionally, you may be subject to penalties for letting your KTN expire. It is important to renew your KTN before it expires to avoid any potential penalties.

Penalties for Letting Your Known Traveler Number Expire
If you let your known traveler number expire, you may face penalties. Depending on the program, you may be subject to fines or even criminal charges. Additionally, you may be denied entry into the U.S. or other countries if your KTN has expired. It is important to remember that you can avoid these penalties by renewing your KTN before it expires.
What to Do if Your Known Traveler Number Expires
If your known traveler number has expired, you will need to reapply for a new one. The process of applying for a new KTN is generally the same as applying for the first time. You will need to provide your full name, date of birth, address, and other identifying information. Additionally, you may be required to provide additional documents or information. Once your application has been processed, you will be issued a new KTN.
Conclusion
Known traveler numbers are an important part of the trusted traveler program and can help make travel easier and faster. However, it is important to remember that they expire after five years, and you will need to renew them before they expire. Additionally, if you let your KTN expire, you may be subject to penalties. By understanding the shelf life of known traveler numbers and taking steps to keep yours up to date, you can ensure that you continue to enjoy the benefits of the trusted traveler program.
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