
The TWIC card, or Transportation Worker Identification Credential, is a form of ID that can be used by certain workers to access secure areas of maritime facilities and vessels. While some sources suggest that a TWIC card can be used as a secondary form of ID at airport security checkpoints, others advise against relying on it as a primary form of identification for air travel. In some cases, TSA agents may not accept a TWIC card as a valid form of ID, and individuals may be asked to provide additional forms of identification. However, a TWIC card can be used to obtain TSA Precheck, which allows cardholders to go through a shorter security screening process at participating airports.
| Characteristics | Values |
|---|---|
| Full Form | Transportation Worker Identification Credential |
| Use | Required for workers who need access to secure areas of the nation's maritime facilities and vessels |
| Usage at Airport Security | Can be used as a secondary ID but not as a primary ID |
| TSA Precheck | Can be used while booking a flight by looking for "known traveler number" on the card |
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What You'll Learn

Using a TWIC card as a primary ID at the airport
TWIC stands for Transportation Worker Identification Credential. This card is required for workers who need access to secure areas of the nation’s maritime facilities and vessels. The TSA conducts a security threat assessment (background check) to determine a person’s eligibility and issues the credential. U.S. citizens and immigrants in certain categories may apply for the credential.
When you arrive at the airport, you will need to show your TWIC card at the designated security checkpoint. However, it is important to note that the TWIC card may not always be accepted as a primary form of identification. Some sources suggest that it can be used as a primary ID, especially for foreigners who want to avoid the wear and tear on their passports caused by TSA agents. However, others have reported that their TWIC card was not accepted as a primary ID and they were asked to provide additional forms of identification.
To be able to get through security, everyone over the age of 18 must show a primary form of identification. If you arrive at the airport without proper ID, the TSA may ask for secondary IDs to confirm your identity. These documents should include identifying information such as a photo, address, phone number, social security number, or date of birth. There is no standard list of what secondary forms of IDs are accepted, so it is recommended to bring whatever you have available.
When booking a flight, you can add your TWIC information to your reservation by looking for the "known traveler number" and entering the number on the bottom left on the back of your TWIC card. This should result in your boarding pass being marked with the TSA pre-check symbol. However, there may be issues with getting your TWIC number accepted by certain airline apps or websites.
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TWIC card as a secondary ID at the airport
TWIC stands for Transportation Worker Identification Credential. It is a card that is required for workers who need access to secure areas of the nation's maritime facilities and vessels. The TSA, which operates airport security checkpoints, conducts a background check when you sign up for this card.
TWIC cards can be used as a secondary form of identification at the airport. If you arrive at the airport without proper ID, the TSA may ask for secondary IDs to confirm your identity. These documents should include identifying information such as a photo, address, phone number, social security number, or date of birth. There is no standard list of what secondary forms of ID are accepted by the TSA. However, some people have reported issues with using their TWIC card as a primary form of ID at airport security checkpoints. In some cases, the card readers at the checkpoint may not be able to scan TWIC cards properly.
To use your TWIC card for TSA Precheck, you can enter the KTN (Known Traveler Number) from your card when booking a flight. This should add the TSA Precheck symbol to your ticket. However, some people have reported issues with this process, with their KTN not appearing on their boarding pass.
While a TWIC card can be used as a secondary form of ID, it is recommended to have a primary form of identification when travelling through airports to avoid potential issues.
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TSA precheck with a TWIC card
The Transportation Security Administration (TSA) has expanded its TSA PreCheck eligibility to include all active Transportation Worker Identification Credential (TWIC) cardholders. This means that if you possess an active TWIC card, you can use it to obtain TSA PreCheck benefits when taking a flight.
TSA PreCheck is an expedited screening program that offers a more seamless security experience at over 200 participating airports across the nation. With TSA PreCheck, travellers can keep their shoes, light outerwear, and belts on, and their laptops can remain in their cases. Additionally, food items and compliant liquids/gels are allowed to remain in carry-on luggage.
To take advantage of this benefit, active TWIC cardholders must enter their TWIC credential identification number (CIN) in the known traveller number (KTN) field during the airline reservation process. The CIN can be found on the back of the TWIC card in the lower left-hand corner.
It is important to note that while the TSA PreCheck option is now available to active TWIC cardholders, some have reported challenges in using their TWIC card as their primary form of identification at airport security checkpoints. In such cases, travellers may need to present additional forms of identification, such as a passport or driver's license, to confirm their identity. Therefore, it is recommended to carry alternative forms of ID as a backup when travelling.
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TWIC card as a substitute for a passport
TWIC cards, or Transportation Worker Identification Credentials, are issued by the Transportation Security Administration (TSA). They are required for workers who need access to secure areas of maritime facilities and vessels in the US. The TSA conducts a background check on applicants before issuing the card.
TWIC cards are considered a federally issued ID and can be used as a form of identification at airport security checkpoints. However, it is important to note that TWIC cards may not always be accepted as a primary form of ID at airports. Some sources suggest that TSA agents may require additional forms of identification, such as multiple credit cards, even when a TWIC card is presented. This may be because the TWIC card reader at the checkpoint is unable to process the card.
While a TWIC card can be used as a substitute for a passport at airport security in certain cases, it is not a substitute for a passport itself. A passport is still required for international travel, as it serves as proof of citizenship and identity. When applying for a passport, individuals must provide a primary form of identification, such as a driver's license or birth certificate. While a TWIC card can be used as a form of ID in many situations, it is always a good idea to carry a passport when travelling internationally to avoid any potential issues.
In conclusion, while a TWIC card can be a useful form of identification and provide certain benefits when travelling, such as reducing the handling of one's passport, it should not be relied upon as a sole substitute for a passport when travelling internationally. Carrying both forms of identification can ensure a smoother travel experience and comply with any identification requirements.
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TWIC card application and eligibility
The Transportation Worker Identification Credential, also known as TWIC®, is a card that provides access to secure areas of the nation's maritime facilities and vessels. It is required by the Maritime Transportation Security Act for workers who need access to these areas.
To obtain a TWIC card, applicants must be eligible US citizens, lawful permanent residents, naturalized citizens, or fall into certain categories of immigrants, non-immigrants, asylees, or refugees who are in lawful status. Most mariners licensed by the US Coast Guard also require a TWIC card. Applicants should also note that the TSA conducts a security threat assessment (background check) to determine their eligibility and issue the credential.
The application process involves submitting the necessary information and paying the required fee. Applicants can choose to have their TWIC card mailed to their home address or pick it up at the application center. It is recommended that applicants enrol for TWIC a minimum of 60 days before they require a valid TWIC card, as processing times may exceed 45 days.
TWIC cards are typically valid for five years from the chosen issuance date. Applicants can also apply for a reduced rate if they present a valid driver's license with a hazardous materials endorsement or a Free and Secure Trade card.
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Frequently asked questions
No, it is recommended that you do not rely on your TWIC card as a primary ID at the airport.
Yes, your TWIC card can be used as a secondary form of ID at the airport.
TWIC stands for Transportation Worker Identification Credential. This card is required for workers who need access to secure areas of the nation’s maritime facilities and vessels.










































