

If you’re an immigrant or visa holder navigating the complexities of U.S. immigration, understanding your alien registration number (A-number) is essential. This unique identifier plays a critical role in your interactions with U.S. Citizenship and Immigration Services (USCIS), but many people are unsure whether it appears on their passport. In this article, we’ll clarify where your A-number can be found, explain its significance, and provide actionable tips to manage it effectively.
What Is an Alien Registration Number?
Your alien registration number (A-number) is a unique seven- to nine-digit identifier assigned to non-citizens by USCIS.
Key Facts About the A-Number
- Format: Typically starts with “A” followed by 7–9 digits (e.g., A123456789).
- Purpose: Tracks immigration records, applications, and status.
- Usage: Required for forms such as Form I-485 (Green Card application), Form I-765 (Work Permit), and interactions with USCIS or immigration courts.
Tip: Keep a copy of your A-number in a safe place; you’ll need it for most immigration applications and correspondence.
Is the Alien Registration Number on Your Passport?
One of the most common questions among immigrants is whether the A-number is printed on their passport.
U.S. Passports vs. Foreign Passports
U.S. Passport: U.S. citizens do not have an A-number because it only applies to non-citizens.
Foreign Passport: Your alien registration number is not printed on your foreign passport either. Passports issued by other countries typically contain only your passport number, nationality, and other personal identifiers—not your USCIS A-number. Read detailed guide on alien registration number.
Where You Can Find Your A-Number
If it’s not on your passport, you can find your A-number in other official immigration documents:
- Green Card (Permanent Resident Card): The A-number is printed on the front side, usually under the USCIS number or “A#”.
- Employment Authorization Document (EAD): Your A-number is located under “USCIS#” on the card.
- Immigration Notices: Forms such as Form I-797 (Notice of Action) or approval letters from USCIS include your A-number.
- Immigration Court Documents: If you’ve interacted with an immigration court, your A-number will appear on court-issued papers.
Practical Tip: Always carry a document with your A-number, especially if you are filing immigration paperwork or traveling internationally.
Why Knowing Your A-Number Matters
Understanding and keeping track of your A-number is important for several reasons:
- Immigration Applications: Almost all USCIS forms require your A-number if you have one.
- Status Verification: The A-number allows USCIS officers and attorneys to access your complete immigration record.
- Avoiding Errors: Using the wrong A-number can delay applications or cause processing errors.
- Travel & Work Authorization: Your A-number links your passport, visa, and employment authorization documents in USCIS records.
Common Misconceptions About A-Numbers and Passports
- My passport shows my A-number.
✅ False. Passports, whether U.S. or foreign, do not include your A-number. It is always issued by USCIS.
- I can use my passport instead of my A-number for applications.
❌ False. USCIS requires the A-number to identify your immigration record accurately.
- I don’t have an A-number if I’m on a visa.
⚠️ Partially true. Some visa holders may not yet have an A-number (e.g., temporary visitors), but anyone with a green card, EAD, or immigration proceedings will have one.
Tips for Managing Your A-Number
- Store It Securely: Keep copies in a safe location, separate from your passport.
- Reference Correctly: Always enter it exactly as shown on your immigration documents.
- Check for Updates: If your status changes (e.g., from visa holder to permanent resident), your A-number stays the same, but ensure all documents reflect it.
- Seek Legal Advice if Lost: If you lose documents containing your A-number, consult an immigration attorney to avoid complications.
Conclusion
In summary, your alien registration number is not printed on your passport, but it’s a critical identifier for your immigration records and applications. You can find it on green cards, EADs, and official USCIS notices. Keeping track of your A-number ensures smoother interactions with USCIS and helps prevent errors in applications.
External Resources
For authoritative information on A-numbers, consider visiting:
U.S. Citizenship and Immigration Services (USCIS) – About A-Numbers





