The I-797 approval notice for an I-129 petition is the document USCIS mails to the petitioning employer once it approves the request to bring a foreign worker to the United States in a nonimmigrant classification like H-1B, L-1, O-1, or TN. What that notice lets the worker do next depends entirely on which lettered version arrived in the mail: an I-797A comes with a new I-94 attached and grants status and work authorization inside the country, while an I-797B means the worker still needs a visa stamp from a U.S. consulate before entering.
The notice carries a 13-character receipt number (three letters followed by ten digits) that you use to track the case at the USCIS Case Status tool.1U.S. Citizenship and Immigration Services. Checking Your Case Status Online It also shows the approved classification, the employment validity dates, and the beneficiary’s biographical information. If any of that is wrong, the employer needs to contact USCIS right away, because errors surface at the worst moments: at a consular interview, at a port of entry, or during an I-9 audit. The employer is the petitioner and gets the original, so the worker should ask for a full copy for their own records.
Which Version You Received: I-797A or I-797B
USCIS issues the I-797 in several variants, and two of them follow an approved I-129.2U.S. Citizenship and Immigration Services. Form I-797 Types and Functions The difference matters more than almost any other detail on the page.
An I-797A approves the petition and grants a change or extension of status inside the United States at the same time. It has a tear-off section at the bottom that is a new Form I-94, Arrival/Departure Record. That I-94 is your proof of lawful status and work authorization in the new classification. You do not need to leave the country or visit a consulate to begin working.
An I-797B approves the petition but does not grant status. It is issued when the beneficiary is outside the U.S., or when the employer did not request a concurrent change of status. Before entering the country in the new classification, the beneficiary needs to apply for a visa stamp at a U.S. embassy or consulate.
The I-797C Is Not an Approval
An I-797C looks similar and is easy to mistake for the real thing, but it only confirms that USCIS received the petition.3U.S. Citizenship and Immigration Services. Form I-797C, Notice of Action It does not authorize work, does not grant status, and cannot be used at a consulate to schedule a visa interview. The receipt number on it is the same one that will appear on the eventual I-797A or I-797B, so keep it for tracking. Do not treat it as evidence of an approved petition.
Using an I-797B at a Consulate
If you received an I-797B, the next step is a visa application abroad. Complete the DS-160 online, schedule an interview, and bring the notice with you. The receipt number, classification, and validity dates on the I-797B are what you need to fill out the DS-160 accurately.
At the interview, the consular officer verifies the approved petition in government databases. Holding the I-797B does not guarantee a visa. The officer still evaluates whether you qualify for the classification and whether any grounds of inadmissibility apply. Without the approved petition showing in the system, though, the officer cannot issue the stamp at all.
Bring the original I-797B or a clear copy, plus the underlying documents your employer filed with the I-129: the offer letter, the labor condition application in H-1B cases, and evidence of your qualifications. Consulates differ in how much they want to see, and having the full file avoids a return trip.
Using an I-797A Inside the U.S.
The I-797A confirms you are already in the new nonimmigrant status without leaving the country. The tear-off I-94 at the bottom is the piece that carries the legal weight. It supersedes any prior I-94 and sets your new authorized period of stay.
Read the I-94 dates carefully. The authorized stay on the I-94 is sometimes shorter than the petition’s overall approval period, and the I-94 date controls. If your I-94 expires September 30 but the petition was approved through the following March, you fall out of status on October 1 unless you file for an extension before September 30.
The Paper I-94 and the CBP Electronic Record
Workers who entered the U.S. at an airport or seaport usually have an electronic I-94 created by CBP rather than a paper card, and you can retrieve and print it at the CBP I-94 website.4U.S. Customs and Border Protection. I-94 Official Website If you changed status through USCIS and received an I-797A with a paper I-94 tear-off, that paper I-94 controls your status, not whatever the CBP system shows from your last physical entry.
Short Trips to Canada or Mexico With an Expired Visa Stamp
If you are already in nonimmigrant status and take a brief trip to Canada or Mexico, you may not need a valid visa stamp to come back. Under automatic visa revalidation, an expired visa is treated as valid for re-entry when you meet every condition in the regulation.5eCFR. 22 CFR 41.112 – Validity of Visa The conditions are:
- Your absence was 30 days or less, and limited to Canada, Mexico, or adjacent islands (excluding Cuba).
- You have an unexpired I-94 showing your current nonimmigrant status.
- You intend to resume the same classification you held when you left.
- Your passport is valid.
- You did not apply for a new U.S. visa while abroad.
- You are not a national of a country designated as a state sponsor of terrorism.
When this rule applies, your I-797 approval notice paired with a valid I-94 does the work a visa stamp would otherwise do. Do not surrender your I-94 when you leave.
Using the Approval Notice for Form I-9
Every employer in the United States must complete a Form I-9 to verify a new hire’s identity and work authorization. For nonimmigrant workers, the I-94 is central. A foreign passport combined with a Form I-94 showing the nonimmigrant classification qualifies as a List A document, establishing identity and employment authorization in one step.6U.S. Citizenship and Immigration Services. 13.0 Acceptable Documents for Verifying Employment Authorization and Identity
The employer should confirm the I-94 has not expired and that the employment matches the terms of the approved petition. When the I-94 attached to an I-797A supersedes a prior CBP-issued I-94, use the I-797A version. The approval notice itself is not a List A, B, or C document; the I-94 is the operative record.
If the Petition Is Revoked or Employment Ends
An approved I-129 petition can be revoked. Automatic revocation happens when the employer goes out of business, withdraws the petition in writing, or tells USCIS that the beneficiary is no longer employed in the role described in the petition.7U.S. Citizenship and Immigration Services. USCIS Policy Manual Volume 2, Part N, Chapter 6 – Post-Adjudication Actions USCIS can also issue a Notice of Intent to Revoke if it later discovers the petition contained false information or the terms of the approval were violated.
When employment ends for any reason, workers in H-1B, L-1, O-1, E-1, E-2, E-3, H-1B1, and TN status get a grace period of up to 60 consecutive days, or until the end of the authorized validity period, whichever is shorter.8eCFR. 8 CFR 214.1 – Requirements for Admission, Extension, and Maintenance of Status During that window you are considered to be maintaining status. You cannot work, but you can file a new petition with a different employer, apply for a change of status, or arrange to leave the country. The grace period is available once per authorized validity period, and USCIS has discretion to shorten or eliminate it.
Replacing a Lost or Damaged I-797
If the original notice is lost, damaged, or destroyed, the petitioning employer files Form I-824, Application for Action on an Approved Application or Petition, to request a duplicate.9U.S. Citizenship and Immigration Services. Application for Action on an Approved Application or Petition The beneficiary cannot file this form independently. The employer is the petitioner of record on the I-129 and has to sign and submit it.
USCIS directs applicants to the current fee schedule at uscis.gov for the I-824 filing fee. Check that page before filing to confirm the current amount.10U.S. Citizenship and Immigration Services. Instructions for Application for Action on an Approved Application or Petition Processing times run long, often several months to a year, so file promptly rather than waiting until a deadline is close.