Canadian professionals working in the United States under TN status sometimes encounter issues when traveling internationally. Upon returning to the U.S., a U.S. Customs and Border Protection (CBP) officer asks for an I-797 approval notice. While unsettling, this situation reflects a broader, ongoing misunderstanding of how TN status works, not a mistake by those under valid TN status.
Why This Issue Happens
Most employment-based nonimmigrant workers in the U.S. obtain work authorization through U.S. Citizenship and Immigration Services (USCIS). In those cases, an approved petition is documented on Form I-797, which becomes a central proof of work authorization. Because of this, some CBP officers default to expecting an I-797 from any foreign national entering the U.S. for employment purposes. However, this assumption does not always apply to TN professionals.
TN Status Is Different from Most Work Visas
TN status, created under the United States–Mexico–Canada Agreement (USMCA), allows qualified Canadian and Mexican professionals to work in the U.S. in designated occupations. Unlike many other work visa categories, TN status can be granted without a petition filed with USCIS. Depending on how TN status was obtained, a worker may never receive an I-797 approval notice.
When a TN Worker Will Have an I-797
A TN worker will typically have an I-797 approval notice only if the employer filed a petition with USCIS, such as:
- An extension of TN status filed from within the United States
- A change of status to TN from another non-immigrant category
- A TN petition filed by mail instead of applying at the border
In these situations, USCIS issues an I-797, and in some cases attaches a new I-94 to the approval notice.
When an I-797 Does Not Exist
Many TN professionals, especially Canadian citizens, obtain TN status directly at a U.S. port of entry or preclearance location. Mexican citizens typically apply for a TN visa at a U.S. consulate and are admitted in TN status upon entry.
When TN status is granted through these processes, USCIS is not involved, and no I-797 is issued. Instead, the worker’s lawful status is documented by:
- The admission stamp in the passport (if applicable)
- The electronic I-94 record showing TN classification and validity dates
In these cases, the I-94, not an I-797, is the primary evidence of TN status.
What CBP Should Review on Reentry
When a TN worker returns to the U.S. after international travel, CBP officers typically assess:
- A valid passport
- A TN visa, if required
- Evidence of qualifying employment
- The I-94 record confirming TN status and expiration
An I-797 is relevant only if one was previously issued. It is not a universal requirement for TN reentry.
Best Practices for TN Travelers
To minimize confusion or delays during inspection, TN workers should consider traveling with:
- A printed copy of the most recent I-94
- An updated employer support letter
- Recent pay stubs or employment verification
- Copies of prior TN documentation, if available
- An I-797 approval notice, if one exists
Carrying these documents is not always mandatory, but they can help clarify eligibility when questions arise.
Final Thoughts
TN status operates under rules that differ significantly from most employment-based visa categories. While CBP officers are tasked with enforcing immigration laws, misunderstandings about TN documentation continue to occur. The key takeaway is simple: an I-797 is required only when USCIS has issued one. Many TN professionals lawfully hold status without ever receiving that document. TN workers who travel frequently should understand their documentation and be prepared to explain how their status was obtained. Proper preparation can help avoid unnecessary stress at the border.
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JEREMY L. RICHARDS is the founding partner of Richards and Jurusik and has dedicated his career to U.S. immigration law, with a specialized focus on assisting Canadian and Mexican citizens under the United States-Mexico-Canada Agreement (USMCA) to work and live in the United States. (Full Bio)
