What Is the I 551 Form

If you see Form I-551, you’re looking at the formal name for a U.S. Permanent Resident Card. Most people call this document a green card.

The confusion starts because “I-551” can also describe temporary proof of permanent residence, such as an I-551 stamp or an endorsed machine-readable immigrant visa. Those documents are not the regular plastic card, but they can serve as evidence of the same permanent resident status for a limited purpose or period.

It also helps to keep I-551 separate from Forms I-485 and I-94. They are different immigration documents with different jobs.

The name behind the green card

Form I-551 is the official designation for the U.S. Permanent Resident Card. USCIS issues it to a person who has been granted authorization as a lawful permanent resident.

So, when someone asks, “What is the I-551 form?” the simple answer is:

> Form I-551 is the Permanent Resident Card, commonly called the green card.

The card is a physical document. It shows that the person has lawful permanent resident status in the United States.

You may see the term “I-551” on immigration, employment, or identity-document lists. In those settings, it generally refers to the Permanent Resident Card itself unless the wording clearly mentions temporary evidence, a stamp, or a visa.

Is Form I-551 the same as a green card?

Yes. Form I-551 and a green card refer to the same permanent resident card.

“Green card” is the everyday name. “Form I-551” is the formal immigration name or designation.

A person might use either term in conversation:

• “I received my green card.”
• “I received my Form I-551.”
• “My Permanent Resident Card arrived.”

All three statements point to the same physical document.

There is one detail that causes many mix-ups. A person can sometimes have temporary I-551 evidence before receiving, replacing, or using the physical card. That temporary evidence may appear as a stamp in a passport or as an endorsed immigrant visa. It does not turn those documents into the plastic green card. It means they are being used as proof of permanent resident status in that situation.

What information and immigration status the Permanent Resident Card represents

The Permanent Resident Card represents a grant of lawful permanent residence. In plain terms, it is the document connected to a person’s status as a U.S. lawful permanent resident.

The card also identifies the person it belongs to. It is meant to connect the individual with the permanent resident status shown by the document.

The key point is the status behind the card. Form I-551 is not simply a receipt, application notice, or travel record. It is the formal designation for the card issued after lawful permanent resident authorization has been granted.

That distinction matters if you’re comparing documents. A paper connected with an immigration application may show that a case exists or is being handled. The Permanent Resident Card represents the granted permanent resident status itself.

I-551 stamps, ADIT stamps, and temporary proof of permanent residence

An I-551 stamp is temporary evidence of permanent resident status placed in a passport or another suitable document. You may also hear it called an ADIT stamp.

The stamp is not the same thing as the regular plastic Permanent Resident Card. It is a separate form of evidence that can be used when someone needs proof of permanent residence and does not have the card available in hand.

For example, the distinction looks like this:

• Permanent Resident Card: The physical green card, formally called Form I-551.
• I-551 stamp or ADIT stamp: Temporary evidence of permanent resident status.
• Temporary evidence wording: Language showing that another immigration document is being accepted as proof for a limited purpose.

This is why two people may both mention “I-551” while holding different documents. One person may mean the green card. Another may mean an I-551 stamp used as temporary proof.

Don’t assume that every I-551 reference means a plastic card. Read the surrounding wording. If it says “stamp,” “ADIT,” or “temporary evidence,” it is talking about proof that stands in for the card for a time or a particular need.

How a machine-readable immigrant visa can serve as temporary I-551 evidence

A machine-readable immigrant visa is an immigrant visa with information that can be read by document systems. In some cases, the visa can include language stating that, once endorsed, it serves as temporary I-551 evidence of permanent residence.

That means the visa may do more than show an immigrant visa. After the required endorsement, it can also serve as temporary proof that the person has lawful permanent resident status.

This is another reason the terms can feel confusing:

• The immigrant visa is not the same physical document as the green card.
• It can still serve as temporary I-551 evidence after endorsement.
• The wording on the visa matters.

So if you see “temporary I-551” connected to a machine-readable immigrant visa, that does not mean the visa has become a Permanent Resident Card. It means the endorsed visa is being used as temporary evidence of permanent residence.

The safest approach is to look at the exact document and its wording. A visa, a passport stamp, and a plastic card may all relate to permanent resident evidence, but they are not interchangeable documents in every context.

Form I-551 versus Form I-485

Form I-551 and Form I-485 are different things.

Form I-551 is the Permanent Resident Card, or green card. It is the document that represents lawful permanent resident status after that status has been granted.

Form I-485 is a separate immigration form. It is not another name for the green card, and filing or receiving something connected with Form I-485 does not make that document an I-551.

A simple way to keep them straight:

• I-551: The Permanent Resident Card.
• I-485: A separate form used in the immigration process.
• I-551 stamp: Temporary evidence of permanent residence.
• Endorsed machine-readable immigrant visa: Another document that may serve as temporary I-551 evidence.

The numbers look similar, which is why people often mix them up. But the forms have different roles. If a notice, receipt, or case update mentions I-485, it should not automatically be treated as proof that the person has received Form I-551.

For case-specific questions about how an I-485 case relates to a person’s status or documents, check current USCIS guidance or speak with a qualified immigration professional.

Form I-551 versus Form I-94

Form I-551 is not the same as Form I-94.

The Permanent Resident Card is Form I-551. It is tied to lawful permanent resident status.

Form I-94 is a separate U.S. immigration record. It should not be treated as another name for the green card or as a replacement for Form I-551.

Here’s the short version:

The important thing is not to rely only on the number. Check the full document name and what the document is being used to show. I-551, I-485, and I-94 are not interchangeable.

What happens after receiving Form I-551

If you receive Form I-551, you have received the document commonly known as your green card or Permanent Resident Card.

At that point, keep the card with your other important immigration documents and use the exact name shown in any form or request you’re completing. If a request asks for Form I-551, it is generally referring to the Permanent Resident Card unless it specifically asks for temporary evidence, an I-551 stamp, or an endorsed immigrant visa.

If you have a stamp instead of a card, don’t describe it as the plastic green card. Call it temporary I-551 evidence or an I-551/ADIT stamp. That small wording difference can matter when an employer, agency, or immigration office is checking documents.

And if your situation involves an I-485, I-94, visa endorsement, or a temporary stamp, check the exact document language before deciding what it proves. For case-specific questions, verify the details through official USCIS guidance or ask a qualified immigration professional.