How To Find Your Green Card Number: A Step-by-Step Document Location Guide

To find your Green Card number, locate the 13-character alphanumeric string (starting with three letters such as LIN, EAC, SRC, WAC, MSC, or IOE) printed on the back of your physical Form I-551 permanent resident card or on your Form I-797 Notice of Action. If you need your 9-digit USCIS Number (Alien Registration Number), it is printed directly on the front face of all modern cards above the expiration date. Both identifiers can also be retrieved online through your official USCIS account dashboard or on your foreign passport's immigrant visa stamp.

Essential Identifiers and Document Checklist Before Locating Your Number

Locating your permanent resident credentials requires distinguishing between two distinct administrative identifiers: the USCIS Number (also known as the Alien Registration Number or A-Number) and the Card Number (also referred to as the Document Number or Permanent Resident Card Receipt Number). Employers, government agencies, and legal applications frequently request one or both of these identifiers for background checks, Form I-9 employment verification, and visa petitions.

Required Documents and Baseline Parameters

• Primary Documents Required: Physical Permanent Resident Card (Form I-551), Form I-797/I-797C (Notice of Action), Machine-Readable Immigrant Visa (MRIV) inside a foreign passport, or active USCIS Online Account credentials.
• Target Identification Specifications:
  
  
  • USCIS / A-Number: 9-digit numeric sequence (e.g., 012-345-678).
  • Card Number / Receipt Number: 13-character alphanumeric sequence starting with 3 letters followed by 10 digits (e.g., IOE-09-123-45678 or LIN-21-900-50123).
• Processing and Retrieval Duration: Immediate (1 to 2 minutes) with physical documents; 5 to 15 minutes via digital portal access; up to 30 business days if submitting a formal record request through USCIS Freedom of Information Act (FOIA) channels.

Locating Your Green Card Identifiers Across Physical Cards and Legal Notices

Depending on the issue date of your Form I-551 Permanent Resident Card, the structural layout of the card varies. USCIS updated card security features and layout designs in 1997, 2004, 2010, 2017, and 2023. Follow these sequential steps to extract the precise identifier you require.

Step 1: Locate the 13-Character Card Number on Form I-551 (Physical Green Card)

1. Turn your physical Permanent Resident Card to the reverse (back) side if your card was issued after May 2010.
2. Locate the top section of the card back or scan the first line of the Machine-Readable Zone (MRZ)—the two or three lines of text containing embedded bracket symbols (<).
3. Identify the 13-character sequence starting with three capital letters representing the USCIS Service Center that processed the application:
   
   
   • IOE: USCIS Electronic Immigration System (ELIS)
   • LIN: Nebraska Service Center
   • EAC: Vermont Service Center (formerly Eastern Adjudication Center)
   • SRC: Texas Service Center (formerly Southern Regional Center)
   • WAC: California Service Center (formerly Western Adjudication Center)
   • MSC: National Benefit Center (formerly Missouri Service Center)
4. Record the three letters and the trailing 10 numerical digits. This total string is your official Card Number (Document Number).

Pro-Tip: On cards issued between May 2010 and April 2017, the 13-character Card Number is embedded directly on the back in the first line of the Machine-Readable Zone. It begins at the first character following the character code C1 or C2.

Step 2: Identify the 9-Digit USCIS Number (Alien Registration Number) on the Card Front

1. Flip the card to the front face.
2. Search for the field explicitly labeled USCIS #, USCIS Number, or Alien Registration Number.
3. On redesigns issued from April 2017 to the present (including the 2023 red-and-white holographic version), this 9-digit number is displayed prominently under the holder's portrait photo and biographical data.
4. Note that the Alien Registration Number may be preceded by the letter "A" on official correspondence, but the physical card omits the "A" prefix and presents it strictly as a 9-digit sequence (e.g., 099-888-777).

Warning: Do not confuse your 9-digit Social Security Number (SSN) with your 9-digit USCIS/A-Number. While both contain nine digits, the USCIS Number is assigned exclusively by the Department of Homeland Security and remains permanently linked to your immigration master file.

Step 3: Retrieve Identifiers from Form I-797 (Notice of Action)

If your physical Green Card is unavailable, lost, or currently pending production, your Form I-797 approval notice contains identical administrative tracking codes.

1. Locate the physical copy of your Form I-797, Notice of Action approving your Form I-485 (Application to Register Permanent Residence or Adjust Status).
2. Look at the upper right-hand corner of the document.
3. Locate the field labeled Receipt Number. This 13-character code (e.g., MSC2190123456) corresponds directly to the underlying document file and serves as your Card Number equivalent for administrative queries.
4. Locate the field labeled USCIS # or Beneficiary A-Number located in the top center box or body text of the notice to extract your 9-digit Alien Registration Number.

Step 4: Extract Identifiers from an Immigrant Visa Stamp (MRIV)

If you recently entered the United States on an immigrant visa and have not yet received your physical Form I-551 card in the mail, your passport contains your temporary proof of permanent residence.

1. Open your passport to the page containing the Machine-Readable Immigrant Visa (MRIV) foil issued by the U.S. Embassy or Consulate.
2. Locate the line labeled IV Case Number or Registration Number in the central upper section of the visa stamp.
3. Look for the string labeled A-Number or the 9-digit sequence located directly above the Machine-Readable Zone at the bottom of the visa foil. This 9-digit number serves as your permanent USCIS # upon entry into the United States.

Step 5: Query Your USCIS Online Account Portal

1. Access the official myUSCIS portal using a secure web browser.
2. Log in using your verified two-factor authentication credentials.
3. Navigate to the Profile tab or the My Cases dashboard.
4. Select your active or approved Form I-485 or Form I-90 case file. Your assigned USCIS Number and latest Card/Receipt Number will be displayed under the case header summary.

Key Identification Metrics: USCIS Number vs. Card Number vs. Receipt Number

Understanding the functional boundaries and format differences between immigration identifiers prevents submission rejections on federal forms such as Form I-9, Form N-400 (Naturalization), or Form I-130 (Petition for Alien Relative).

Lost Documents and Identification Retrieval Remedies

When physical documentation is damaged, illegible, or lost, standard lookup steps may fail. Use the following systematic remedies to resolve identification retrieval roadblocks.

Scenario 1: Physical Green Card Lost, Stolen, or Destroyed

• Root Cause: Inability to inspect the physical card surface to extract the 13-character Card Number or 9-digit USCIS Number.
• Actionable Fix: Search your personal record archives for past Form I-797 approval notices, historical tax returns that included immigration disclosures, or previous Form I-9 verification forms completed with an employer. If no record copies exist, submit Form I-90 (Application to Replace Permanent Resident Card) online via myUSCIS. Upon filing, the generated electronic receipt notice (I-797C) will display both your permanent 9-digit USCIS Number and your new 13-character receipt/card tracking number.

Scenario 2: Card Number Illegible Due to Surface Wear and Friction

• Root Cause: Physical abrasion of the card back renders the Machine-Readable Zone or top text string unreadable.
• Actionable Fix: Shine an indirect high-intensity light source or ultraviolet penlight parallel to the card surface to read the raised or recessed laser-engraved characters. If the characters remain unreadable, log into your myUSCIS portal account linked to the card's original processing petition to view the digit sequence in your electronic document history.

Scenario 3: Discrepancy Between Form I-797 Receipt Number and Physical Card Number

• Root Cause: USCIS transferred the processing workload between service centers (e.g., from the Nebraska Service Center [LIN] to the National Benefit Center [MSC]) during adjudication, causing the card issuance facility code to differ from the initial receipt notice.
• Actionable Fix: Always prioritize the 13-character code printed directly on the physical Form I-551 card when completing official document verification forms (such as Form I-9). The code printed on the physical card serves as the ultimate "Document Number" for verifying official document authenticity.

Scenario 4: Employment Verification (Form I-9) System Rejection

• Root Cause: Entering the 13-character Card Number into the "USCIS Number" input field, or entering an outdated card number from an expired Green Card.
• Actionable Fix: Re-verify the field assignments on Form I-9 List A. Input the 9-digit number (without hyphens) into the USCIS Number field, and input the 13-character alphanumeric string (starting with 3 letters) into the distinct Card Number field. Ensure the card number corresponds strictly to the currently valid, unexpired card document.

Frequently Asked Questions

Is the Green Card number the same as the USCIS number?

No, they are distinct identifiers. Your USCIS Number (Alien Registration Number) is a permanent 9-digit sequence assigned to your individual immigration file for life. The Green Card number (Card Number) is a 13-character alphanumeric string that identifies the specific physical plastic card document and changes every time a new card is issued, renewed, or replaced.

Where is the Green Card number located on cards issued before 2010?

On Permanent Resident Cards issued between 1997 and April 2010, the 13-character Card Number and 9-digit Alien Registration Number are printed on the front face of the card. The A-Number is listed following the "A#" label, while the card receipt number is located in the top control number text block or within the lower text data stream.

What do the three letters at the beginning of a Green Card number mean?

The three leading letters represent the specific USCIS Service Center or electronic filing system that adjudicated and processed the application. For example, "IOE" indicates the USCIS Electronic Immigration System, "LIN" represents the Nebraska Service Center, "SRC" represents the Texas Service Center, and "WAC" represents the California Service Center.

Can I find my Green Card number using my Social Security Number?

No, public agencies and online portals do not allow direct reverse-lookups of Green Card numbers using a Social Security Number due to federal privacy regulations. You must locate the number through physical USCIS documents, your myUSCIS portal dashboard, or by filing a formal Freedom of Information Act (FOIA) request on Form G-639 with USCIS.

Which number should I use for Form I-9 verification when starting a job?

For Form I-9 Employment Eligibility Verification under List A, you must provide both identifiers if prompted. The 9-digit USCIS Number (A-Number) is entered as your identity identifier, and the 13-character alphanumeric string (starting with three letters) is entered into the designated "Card Number" field along with the card's expiration date.

Streamline Your Immigration Document Management

Maintaining precise records of your USCIS numbers and card identifiers ensures seamless processing for citizenship applications, employment verifications, and international travel. Always store high-resolution digital copies of both the front and back of your Form I-551 card in a secure, encrypted storage location to expedite document recovery if your physical card is misplaced.