An alien registration number, often abbreviated as A-Number or prominently displayed on an EAD card, serves as the unique identifier assigned by U.S. Citizenship and Immigration Services (USCIS) to every non-citizen required to register inside the United States. This numerical code is not merely a bureaucratic formality; it is the linchpin that connects an individual to their immigration case, work authorization, and every official interaction with the federal government. Understanding this number is fundamental for any foreign national navigating the complex landscape of U.S. immigration status.
What is an Alien Registration Number?
At its core, the alien registration number is a distinct, seven- or eight-character identifier that begins with the letter "A". You will find this code on the front of your Employment Authorization Document (EAD), also known as a work permit, and it is also present on your Form I-94, Arrival/Departure Record. This number is generated the moment an individual files an application to adjust status or to register as a non-immigrant or immigrant, and it remains with the person throughout their entire stay in the United States. Think of it as the serial number for a person's immigration identity, used to pull up records, verify eligibility, and process benefits.
Location on Key Documents
Locating your A-Number is essential for filling out forms correctly and ensuring smooth processing. On an EAD card, the number is typically printed in the top right corner, labeled clearly as "USCIS #" or "Application Number". On the I-94 form, which is now primarily issued electronically, the number appears in the section detailing the non-immigrant status. If you are reviewing a physical Notice of Action or I-797 approval notice, the A-Number is usually situated at the top of the document, immediately following the specific notice type code. Consistently referencing this number ensures you are tracking the exact case and avoids confusion with similarly named applicants.
Why the A-Number Matters for Employment
For individuals seeking to work legally in the United States, the alien registration number is the bridge between immigration status and employment eligibility. When completing the I-9 Verification Form required by the Department of Homeland Security, employees must provide their A-Number in Section 1, alongside their name and date of birth. Employers use this specific number to verify that the worker is authorized to accept employment in the U.S. and to report new hire information to the government. Without this identifier, payroll systems and government databases cannot accurately link the employee to their work authorization record.
Connecting to Government Systems
The A-Number functions as the primary key in USCIS’s vast database. Whenever an applicant or a caseworker logs into the USCIS online account portal, known as "myUSCIS", the system retrieves the file using this registration number. It is used to check the status of applications, view biographical information, and track the history of immigration proceedings. Whether an individual is applying for a green card extension, seeking asylum, or adjusting status, customer service representatives and adjudicators rely on the alien registration number to access the correct case file instantly.
Common Misconceptions and Clarifications
One frequent point of confusion involves the relationship between the A-Number and the green card number. For permanent residents, the green card itself contains a different number, typically a nine-digit "Receipt Number" or the "USCIS Number" printed on the back. While the green card number identifies the physical document and the current status of permanent residency, the alien registration number is the original identifier assigned during the application process that led to that green card. They are linked but distinct identifiers serving different purposes in the immigration system.
