What Is a Card Number on Green Card

The green card number is usually the 13-character code printed on the back of your Permanent Resident Card. It is different from the 9-digit USCIS number on the front. The easiest way to avoid mixing them up is to check three things: where the number appears, how long it is, and how it is formatted.

What the card number on a green card means

A green card number is a unique identifier connected to your Permanent Resident Card. It helps identify the specific card or document when you complete an employment form, travel request, identity check, or other official paperwork.

On current card designs, this number is generally:

• 13 characters long
• Made up of three letters followed by 10 numbers
• Printed on the back of the card

For example, a made-up green card number might look like:

`ABC1234567890`

That example shows the format only. It is not a number you should use on a form. Your own card has its own identifier.

You may see this number described in different ways. Some requests may call it the green card number, card number, permanent resident number, or document number. Those terms can point to the same back-of-card identifier, but you should still read the wording on the form carefully.

Where to find the card number on the back of the green card

Turn the card over and look for the card or document information printed on the reverse side. The number you need is generally the long code with 13 total characters.

The back is the key place to check when a request asks for:

• Your green card number
• Your card number
• Your document number
• The number from your Permanent Resident Card

A quick visual check can help:

1. Look at the back of the card.
2. Find the long alphanumeric code.
3. Count the characters if you are unsure.
4. Check that it starts with three letters and continues with 10 numbers.

Do not automatically copy the first number you see on the front. The front contains other identifying information, including the USCIS number, and that is a separate number.

How the 13-character green card number is formatted

The current green card number format is generally:

Three letters + 10 numbers = 13 characters

A generic example is:

`XYZ9876543210`

Here, `XYZ` represents the three letters, and `9876543210` represents the 10 numbers.

Pay attention to letters and numbers that can look alike. Depending on the card’s print quality, a letter such as `O` may look similar to the number `0`. The same can happen with other characters. If you are copying the number into a form, zoom in carefully or compare the code with the card more than once.

Do not add spaces or punctuation unless the form specifically asks for them. If an online form rejects the format, check its instructions before changing the number or leaving characters out.

Green card number vs. USCIS number: the difference

The USCIS number is not the same as the green card number.

The easiest way to tell them apart is by location and length:

So, if you are asking, “What is the USCIS Number on Green Card?” the answer is the 9-digit number on the front.

If you are asking for the green card number or document number, the request generally means the 13-character code on the back.

This also answers a common question: Is the USCIS number the same as the green card number? No. They are separate identifiers. The front-versus-back rule is the fastest way to keep them straight.

Is my 9-digit number a number on my green card?

Yes. The 9-digit number is printed on the card, but it is identified as the USCIS number. It is not usually the green card or document number requested from the back.

Is the card number the same as the document number?

For current Permanent Resident Cards, the document number generally refers to the 13-character code on the back. This is the number commonly used when a form asks for the document number of your green card.

That means the terms may work like this:

• USCIS number: 9 digits on the front
• Card number: 13 characters on the back
• Document number: generally the 13-character number on the back

Still, forms do not always use labels in exactly the same way. A request may define the number it wants, show a sample, or tell you where to find it. Follow that wording if it gives a different instruction.

The safest approach is not to treat every number on the card as interchangeable. Match the form’s name to the number’s location and format.

Which number to use for Form I-9 and other requests

For Form I-9, the document number for a current Permanent Resident Card is on the back of the card. It is the 13-character alphanumeric code.

If an I-9 request asks for the document number, do not enter the 9-digit USCIS number from the front. Use the back-of-card identifier instead.

Other requests may use different terms. For example:

• A form asking for your USCIS number generally points to the 9-digit number on the front.
• A form asking for your green card number generally points to the 13-character number on the back.
• A request asking for the document number generally points to the 13-character number on the back.
• An airline or travel-related request may use its own label or field instructions.

Airline bookings and travel checks can be especially confusing because the request may simply say “card number,” “document number,” or “ID number.” Do not guess based only on the word “number.” Check whether the request gives a description, an example, or a place on the card to use.

If the instructions are unclear, use the exact wording in the request to ask the airline, employer, agency, or other organization what it means. A wrong number can cause a mismatch even when the rest of your information is correct.

How to read the front and back of a Permanent Resident Card

Think of the card as having two separate identification areas.

The front

The front includes the 9-digit USCIS number. This is the number to look for when a form specifically asks for your USCIS number.

Do not assume that a number’s position on the front makes it the card number. The number’s label matters.

The back

The back includes the 13-character card or document number. On current designs, it generally starts with three letters and ends with 10 numbers.

This is the number to check when a request asks for:

• Green card number
• Card number
• Document number
• Permanent resident card number

A simple memory trick is:

**Front = 9-digit USCIS number.

Back = 13-character card or document number.**

That front-versus-back split is more useful than trying to memorize every label. If you know where the number is and how many characters it has, you can usually identify the right one.

What to do if the card number is difficult to read or unavailable

If the number is hard to read, do not fill in a form by guessing. First, inspect the back of the card in bright light. A clear photo or scan may also make the letters and numbers easier to tell apart, as long as you protect the card image and personal information.

Check these details:

• Does the number have 13 characters?
• Does it begin with three letters?
• Are the remaining characters numbers?
• Are you looking at the back rather than the front?
• Could a letter be mistaken for a number?

If you do not have the physical card, the supplied card details do not establish a general online lookup method for finding the number. Be careful with websites that promise to retrieve it without clearly explaining their official role. Do not replace the missing number with the 9-digit USCIS number unless the form specifically asks for the USCIS number.

When a form or travel request will not accept the number, read its instructions again and contact the organization that issued the request. Tell them whether you have the 13-character back-of-card number, the 9-digit front-of-card USCIS number, or neither one.

Before submitting anything, check the specific form or request instructions carefully. If you need help identifying numbers on passports, immigration documents, or other official records, the site’s other plain-language guides can help you match each number to the right field.