Alien Registration Number (A-Number) Explained: Identity, Processing, and Dogpay Support

An Alien Registration Number (A-Number) is a unique identifier assigned by the U.S. Citizenship and Immigration Services (USCIS) to non-U.S. citizens. It functions like an immigration ID number, used to track cases across all immigration-related processes such as visa petitions, Green Card applications, and naturalization.

1. What Is an Alien Registration Number (A-Number)?

An Alien Registration Number (A-Number) is a unique identifier assigned by the U.S. Citizenship and Immigration Services (USCIS) to non-U.S. citizens.

It functions like an immigration ID number, used to track cases across all immigration-related processes such as visa petitions, Green Card applications, and naturalization.

Format: Usually starts with “A” followed by 7–9 digits, e.g. A123456789.

It appears on key immigration documents such as:

• Permanent Resident Cards (Green Cards)

• Employment Authorization Documents (EADs)

• Immigrant visa packages and USCIS notices

• Adjustment of Status (Form I-485) receipts

2. Why the A-Number Matters

The A-Number serves as the backbone of all U.S. immigration case tracking:

Use CaseFunctionImmigration record managementUSCIS uses it to connect and manage all petitions and cases.Identity verificationEnsures consistent tracking across OPT, AOS, or Green Card filings.Employment eligibilityUsed on EAD cards and Form I-9 verification by employers.Integration with IRS/SSAHelps link certain visa categories to tax and Social Security systems.Permanent residence and naturalizationA-Number remains a key identifier even after receiving a Green Card.

Tip: Always use the same A-Number throughout your filings. Duplicate or incorrect entries can delay processing.

3. Where to Find Your A-Number

You can locate your A-Number in the following documents:

• Green Card → Listed under “USCIS#”

• EAD Card → Appears next to “USCIS#”

• Visa Packet or I-797 Notice → On cover letter or case notice

• USCIS Online Account → Accessible once linked to your case

If unsure, you can file a Freedom of Information Act (FOIA) request to retrieve your immigration record.

4. How Dogpay Supports the Immigration Payment Journey

While the A-Number identifies who you are, the immigration journey involves multiple cross-border payments:

application fees, medical exams, translations, legal services, and more.

That’s where Dogpay transforms the experience.

💡 Dogpay Advantages:

1. Cross-border payments without friction Pay USCIS filing fees, legal advisors, or certified translators directly from your Dogpay account in multi-currency mode.

2. Transparent exchange rates & minimal fees Real-time FX conversion ensures no hidden markups or transfer surprises.

3. Automatic receipts & financial records Each transaction generates timestamped documentation (PDF/CSV) for submission or audit use.

4. Compliance built-in Every payment undergoes automated KYC/AML screening, aligning with U.S. and international standards.

5. Family or multi-applicant management Dogpay supports shared wallets for family-based immigration applications, consolidating payments in one dashboard.

5. In Summary

Your A-Number is your digital fingerprint within the U.S. immigration ecosystem.

And Dogpay is the trusted tool to handle the financial side—

helping applicants, families, and attorneys move funds globally with speed, security, and traceability.