Is Uscis Number Same as Green Card Number

The short answer is sometimes, depending on what the person or form means by “green card number.” The USCIS Number is the same identifier as the A-Number and Alien Registration Number. It is a nine-digit number connected to your immigration record.

But “green card number” is used less carefully. Some people use it to mean the USCIS Number. Others mean the separate number printed on the physical card, sometimes called a card number or document number.

The safest approach is simple: look at the exact label printed on your Permanent Resident Card, also called Form I-551, and match that label to the wording on the form you’re completing.

The short answer: USCIS Number versus green card number

A USCIS Number is a nine-digit number assigned by the Department of Homeland Security. It identifies the person in the immigration system.

The same number may be called:

• USCIS Number
• USCIS #
• A-Number
• A#
• Alien Registration Number
• Alien Number

These names generally refer to the same identifier.

The phrase green card number, however, does not always point to one specific number. It may mean the USCIS Number, especially in casual explanations. It may also mean the number assigned to the physical green card itself.

That is why two websites can appear to give different answers. They may be using “green card number” in two different ways.

If a form asks for your USCIS Number, A-Number, or Alien Registration Number, use the number shown beside USCIS # or A# on the front of your card.

If it asks for a card number, document number, or another card-specific identifier, look for that exact label instead.

What the USCIS Number and A-Number mean

The USCIS Number is a unique nine-digit identifier connected to a person’s immigration record. It is printed on the front of a Permanent Resident Card.

The A-Number is another name for that same identifier. The “A” stands for “Alien,” which is an older immigration term used in labels such as A# and Alien Registration Number. It does not mean the person is being described as anything other than an immigration applicant or permanent resident in the record system.

For example, a card might show a number next to:

• USCIS # 123456789
• A# 123456789

The labels look different, but the number is serving the same basic purpose.

A Permanent Resident Card also includes information such as the holder’s photo, name, date of birth, and fingerprint. The USCIS Number or A-Number is one part of the identifying information on the card. It is not the same thing as every other number that may appear there.

Where to find the USCIS Number on a green card

Start with the front of the card. Look for the printed label “USCIS #”. On an older card, the label may instead appear as “A#.”

The nine digits beside that label are the USCIS Number, also called the A-Number or Alien Registration Number.

A quick way to check is:

1. Turn the card to the photo side.
2. Find USCIS # or A#.
3. Copy the nine-digit number beside it.
4. Compare the label with the wording on the form.

Do not choose a number only because it is near the person’s name or photo. Green cards can contain more than one number, and the card layout may vary by edition.

The question “where is the green card number located?” needs a label-based answer. The USCIS Number is on the front, but a separate card or document number may also appear on the card. If the form asks for the USCIS Number, find USCIS # or A#, rather than guessing based on the phrase “green card number.”

What people mean by “green card number”

There is no single, consistently used meaning for “green card number” in everyday instructions.

In one context, it means the person’s USCIS Number. In another, it means the number connected to the physical Permanent Resident Card. That second number may be called the card number, document number, or USCIS document number.

This difference matters because the two numbers serve different purposes:

• The USCIS Number/A-Number follows the person’s immigration record.
• The card or document number identifies the physical card or document.

A replacement card, renewal, or new card may have a different card-specific number. The person’s USCIS Number is the immigration identifier shown as USCIS # or A#.

So, if someone says “enter your green card number,” do not assume the answer without checking the form’s instructions. Look for whether the form specifically asks for:

• USCIS Number
• A-Number
• Alien Registration Number
• Card number
• Document number

The exact label is more useful than the informal phrase.

USCIS Number, Alien Registration Number, card number, and receipt number compared

Here’s the distinction in one place:

A receipt number on a green card is not the same as the USCIS Number. A receipt number is tied to a filing or case. It normally comes from a USCIS receipt notice, not from the permanent resident identifier printed beside USCIS # or A# on the card.

If you are checking a case, a receipt number may be the number you need. If you are completing a form that asks for your A-Number, use the USCIS Number instead.

How older and newer green cards may label the number

The wording and layout can change between card designs.

Older green cards may show the identifier as A#. Newer cards may use USCIS #. Both labels can refer to the same nine-digit USCIS Number or A-Number.

That means you should not reject a number simply because your card does not use the exact wording found on a newer form or website. Compare the meaning:

• USCIS # usually points to the USCIS Number.
• A# usually points to the A-Number.
• Alien Registration Number usually points to that same number.
• Card number or document number may point to a different, card-specific identifier.

The design may also affect where the number appears on the front. Use the printed label rather than relying on its position.

Which number to enter on forms and applications

Read the form’s field name closely. Small wording changes can point to different numbers.

Use the number beside USCIS # or A# when the form asks for:

• USCIS Number
• A-Number
• Alien Registration Number
• Alien Number

Use the card-specific number when the form asks for:

• Card number
• Document number
• Permanent Resident Card number
• USCIS document number

Use a receipt number only when the form or instruction asks for a receipt number or a case number connected to a filing.

If the form says only green card number, check the instructions around that question. Look at nearby fields too. For example, if the form separately asks for an A-Number and a card number, it is treating them as different items.

Before submitting, compare the number you entered with the front of the card. Check every digit. A missing digit or a swapped number can cause trouble when a form is matched to an immigration record or document.

Do U.S. citizens or green card holders have an Alien Registration Number?

A green card holder does have an Alien Registration Number. In this context, the Alien Registration Number is the same identifier as the A-Number and USCIS Number. It appears on the front of the Permanent Resident Card.

U.S. citizenship does not automatically mean that every citizen has a USCIS Number or Alien Registration Number. The available card terminology describes this number as an identifier used for an alien or permanent resident record. It would be unsafe to assume that every U.S. citizen has one just because a form asks for one.

If you are a U.S. citizen completing a form with an A-Number field, follow the form’s instructions. Do not make up a number or use a different identification number, such as a Social Security number, unless the form specifically asks for it.

When the wording still feels unclear, match the exact label requested on the form with the exact label printed on the front of your green card. If the labels do not line up, seek advice from a qualified immigration professional before submitting the form.