Key Takeaways
- Only certain I-797 approval notices for immigrants or specific beneficiaries contain an A-Number, a 7-to-9-digit personal identifier.
- The A-Number appears in the upper portion of the notice, labeled “USCIS#” or “Alien #.” Do not confuse it with the 13-character Receipt Number.
- I-797A notices usually include an A-Number. I-797B and I-797C notices often omit it because they serve different immigration purposes.
- If your I-797 does not show an A-Number, check your I-94 record, myUSCIS account, or prior immigration documents before leaving the field blank on forms.
- For expert guidance on locating your A-Number or handling complex immigration forms, Book A Consultation With Jumpstart Immigration to keep your filings accurate and complete.
What Is An A-Number (Alien Registration Number)?
An A-Number is a unique 7-to-9-digit identifier assigned by the Department of Homeland Security to noncitizens. It always appears with the letter “A” in front, such as A123456789. This number tracks your immigration record for life and does not change when you renew a green card or EAD. Depending on the document, it may appear under labels such as “USCIS#,” “Alien #,” or “A#.”
People who typically receive an A-Number include lawful permanent residents, asylees, refugees, EAD holders, and individuals with certain pending or approved USCIS petitions. Some noncitizens never receive one. Many H-1B, L-1, and TN workers hold an I-94 but no A-Number because their petitions did not create an immigration file that generates one.
Where Is The A-Number On An I-797?
On most versions of Form I-797, the A-Number appears near the top of the notice. It often sits in the upper-right area next to the label “USCIS#” or “Alien #.” It starts with the letter A followed by 7 to 9 digits. Only I-797 notices for immigrants or certain beneficiaries include an A-Number, and the exact position can vary slightly.
Sources describe small placement differences. Some I-797 versions display it in the upper right section next to “USCIS#”. Other versions place it in the upper left area near the Receipt Number, labeled “A-Number” or “A#.” The safest approach is to scan the entire upper portion of the notice for any of these labels.
[Insert annotated I-797 image here: red arrow pointing to the upper right corner, labeled “USCIS# A123456789,” with a second annotation at the top identifying the Receipt Number as a 13-character code beginning with three letters such as EAC, WAC, LIN, SRC, or IOE.]
Critical Warning: The A-Number differs from the Receipt Number. The Receipt Number is a 13-character case ID, with three letters followed by ten digits (for example, LIN2412345678). It tracks a specific application, not a person. Always enter the A-Number, not the Receipt Number, when a form asks for an A-Number.
Use this checklist when scanning your I-797. Start by checking the upper portion of the form, both left and right corners. Look for a label that reads “USCIS#,” “Alien #,” or “A#.” When you find a number, confirm its format: the letter A followed by 7–9 digits, such as A123456789. If you see a 13-character code starting with three letters, you found your Receipt Number, so keep looking for the A-Number.
I-797 Types And How They Affect Your A-Number
USCIS issues several versions of Form I-797. Whether an A-Number appears depends on which type you received.
The table below summarizes which I-797 types typically include an A-Number.
| I-797 Type | What It Means | A-Number Present? |
|---|---|---|
| I-797A | Approval notice for applicants already in the U.S., includes a replacement I-94 at the bottom | Usually yes, if the applicant has an assigned A-Number |
| I-797B | Approval notice for consular processing when the applicant remains abroad, no I-94 attached | Sometimes, depending on the petition type |
| I-797C | Receipt or Notice of Action used for receipts, transfers, and rejections | Typically no, because it functions as an administrative notice |
To expand on the table, I-797A is issued when you are already in the U.S. and USCIS approved your petition. It includes a replacement I-94 at the bottom that proves and extends your authorized stay. I-797B goes to applicants processing abroad through a consulate and does not contain a replacement I-94. I-797C serves as an administrative notice that confirms receipt or another procedural action, so it usually does not carry an A-Number. An I-797C without an A-Number reflects a normal document, not a mistake.
What To Do When Your I-797 Has No A-Number
Many people hold an I-797C or I-797B with no A-Number printed anywhere. Use this step-by-step process when that happens:
- Check your I-94 first. Log in at i94.cbp.dhs.gov and pull your most recent record. Most I-94 records for nonimmigrants do not include a USCIS A-Number, but a quick check confirms what appears on file.
- Check your USCIS online account. Your myUSCIS profile at my.uscis.gov may display your A-Number if USCIS has assigned one.
- Review older documents. Check older documents such as a green card, EAD, or prior I-797 approval notice. See the FAQ section for a full list of documents that show your A-Number.
- Assume you do not have one if every search fails. Many H-1B, L-1, and TN workers never receive an A-Number, and this situation remains completely normal.
If a form asks for an A-Number and you do not have one, leave the field blank or write “N/A.” Never guess or substitute your Receipt Number or I-94 Admission Number. If you believe you should have an A-Number but cannot locate it, call the USCIS Contact Center at 1-800-375-5283 or file a FOIA request using Form G-639.
A-Number Vs. Receipt Number Vs. USCIS#: Key Differences
Three identifiers cause the most confusion on immigration forms.
| Identifier | What It Tracks | Format |
|---|---|---|
| A-Number / USCIS# | Your immigration record, which stays with you for life | A + 7–9 digits, or 7–9 digits without the “A” |
| Receipt Number | A specific application or petition, which changes with every filing | 3 letters + 10 digits (for example, EAC1234567890) |
| I-94 Admission Number | A single entry into the U.S. | 11 digits |
The “USCIS#” printed on green cards and EADs matches your A-Number without the leading “A.” For example, A-123456789 and 123456789 represent the same identifier. On I-797 notices, “USCIS#” and “Alien #” describe this same number.
Your Social Security Number comes from the Social Security Administration and supports work and tax reporting. It remains completely distinct from your A-Number, so you may have one, both, or neither.
Now that you understand how these identifiers differ, you can apply that knowledge whenever a form asks for an A-Number, Receipt Number, or I-94 Admission Number.
How To Use Your A-Number On Form I-9 As An Employee
Employees often see A-Number fields on Form I-9 and feel unsure about what to enter. Use these guidelines when you complete or review your own I-9 information.
- Section 1 (Employee). Lawful permanent residents must enter their A-Number or USCIS# in Section 1. A noncitizen authorized to work, such as an H-1B holder, may enter an A-Number if one exists or use an I-94 Admission Number or foreign passport information instead.
- Section 2 (Document details). When your employer completes Section 2, they must record the document number from the physical card you present, not your A-Number. On a green card, the Document Number appears on the back. On an EAD, the Card Number appears on the front.
- Common mistake to avoid. Never copy the Receipt Number from the I-797 into Section 1. Recording errors on Form I-9 can trigger paperwork penalties ranging from $288 to $2,861 per form under 2026 ICE penalty amounts.
Enter the A-Number digits without the “A” prefix, unless your software adds it automatically. Never drop leading zeros. In E-Verify, A-012345678 and 12345678 represent the same identifier. The USCIS Number simply equals the A-Number without the “A” prefix, and leading zeros bring the total to nine digits. If you do not have an A-Number, leave the field blank and use the I-94 or passport path instead.
If you feel unsure about I-9 rules or how your I-797 fits into work authorization, Schedule A Consultation With Jumpstart Immigration to review your situation with an expert.
Frequently Asked Questions
Is The USCIS Number The Same As The Alien Number?
Yes. The “USCIS#” printed on green cards (Form I-551) and Employment Authorization Documents (Form I-766) matches your A-Number without the leading “A.” On I-797 notices, the labels “USCIS#” and “Alien #” refer to this same identifier. Newer documents changed the label, but the underlying number remains identical.
Why Does My I-797 Have No A-Number?
Some I-797 notices go to people without assigned A-Numbers. I-797C notices, which function as receipts and notices of action, usually omit an A-Number because they serve as administrative confirmations rather than approvals. As noted earlier, many nonimmigrant workers on H-1B, L-1, or TN visas do not receive an A-Number at all. This situation reflects a normal case, not a document error.
Where Is The Alien Registration Number On My I-797C?
I-797C notices usually do not display an A-Number. If you need your A-Number and only have an I-797C, check your I-94 record at i94.cbp.dhs.gov, log into your myUSCIS account at my.uscis.gov, or review older immigration documents such as a green card, EAD, or a prior I-797 approval notice. If none of those sources show a number, you likely have not been assigned one yet.
Can I Check My USCIS Case Status With My Alien Number?
USCIS case status checks rely on your Receipt Number, the 13-character code with three letters followed by ten digits printed on your I-797 notice. The A-Number identifies you as a person, and the Receipt Number identifies a specific application. Use the official USCIS case status tool at egov.uscis.gov, which requires no login and accepts the Receipt Number directly.
What Documents Show My Alien Number?
Your A-Number appears on the following documents:
- Green cards (Form I-551), on cards issued after May 10, 2010, labeled “USCIS#” on the front
- Employment Authorization Documents (Form I-766), labeled “USCIS#” on the front
- Immigrant visa stamps in your passport, listed as “Registration Number” in the top right portion of the stamp
- Most I-797 approval notices, in the upper portion of the form, labeled “USCIS#” or “Alien #”
- The Immigrant Data Summary stapled to a consular processing visa package, at the top of the document
Conclusion: Next Steps For Your A-Number And I-797
You now know where to look for your A-Number on an I-797, how to tell it apart from a Receipt Number, and what to do when no A-Number appears. With this clarity, you can complete immigration forms and employment paperwork with more confidence and fewer mistakes.
If you still feel uncertain about your visa category, your I-797, or your path to a green card, Jumpstart Immigration can walk you through your options. With a 98% approval rate, a 100% refund guarantee that includes USCIS government fees, and a process that moves 3–4x faster than many traditional law firms, the team focuses on founders and professionals who need clear answers quickly. Book Your Consultation Today to get practical guidance on your next immigration step.
