US Visa WatchWhat Is an I 551
If you’re asking what is an I-551, the short answer is this: Form I-551 is the official name for the U.S. Permanent Resident Card, commonly called a green card.
The confusion starts because “I-551” can also describe temporary proof of permanent resident status. That proof may appear as an I-551 ADIT stamp in a passport or as an endorsed machine-readable immigrant visa. These documents are related, but they are not all the same thing.
Here’s how to tell them apart.
What the I-551 designation refers to
A Permanent Resident Card, also known as an Alien Registration Receipt Card, is identified as Form I-551.
In everyday speech, people usually call this document a green card. So when someone says “my I-551,” they may mean the physical card in their wallet. The formal name and the common name point to the same permanent resident card.
The card is a physical document. It contains identifying information and a card number. If a form asks for an I-551 Card number, it generally refers to the number printed on the Permanent Resident Card itself. Be careful not to confuse that number with a passport number, a visa number, or a number from another immigration document.
The exact location and format of information on a document can vary. If you’re filling out an official form, check the form’s instructions or ask the relevant immigration agency when you’re unsure which number it wants.
Does an I-551 card mean the same thing as a green card?
Yes. An I-551 card is a green card.
“Green card” is the familiar term. “Form I-551” is the formal designation for the U.S. Permanent Resident Card. You may also see the card described as an Alien Registration Receipt Card.
These names can make it sound as if you’re dealing with separate documents. In this case, you aren’t:
- Form I-551: the formal name for the Permanent Resident Card
- Permanent Resident Card: the official document
- Green card: the common name people use
The tricky part is that temporary documents may also provide temporary evidence of I-551 status. An I-551 stamp, for example, is not the same physical card. It serves a different purpose when someone needs temporary proof of lawful permanent resident status.
The physical I-551 card and temporary proof are different
Think of “I-551” as a document category with two common situations:
- The person has the physical Permanent Resident Card.
- The person has temporary evidence of lawful permanent resident status while the physical card is unavailable.
The physical card is the green card itself. Temporary evidence may be used when the card is lost, expired, or delayed. One form of that evidence is an I-551 ADIT stamp.
That distinction matters. A stamp does not turn into a new physical green card. It is temporary proof connected to the person’s permanent resident status.
An endorsed machine-readable immigrant visa can also serve as temporary I-551 evidence. This is another document that should not be confused with the physical Permanent Resident Card or an ADIT stamp.
A simple way to sort out the terms is:
| Document or term | What it means |
|---|---|
| Form I-551 | The formal designation for the Permanent Resident Card |
| Green card | The common name for the physical Permanent Resident Card |
| I-551 ADIT stamp | Temporary evidence of lawful permanent resident status |
| Endorsed machine-readable immigrant visa | May serve as temporary I-551 evidence after endorsement |
| I-94 | A separate immigration document name; it should not be treated as another name for I-551 |
The document you have, and the purpose for which you need it, both matter.
What an I-551 ADIT stamp can show
An I-551 stamp on a passport is temporary evidence of lawful permanent resident status. It may be relevant when a person’s physical green card is unavailable because it was lost, has expired, or has been delayed.
“ADIT” is the name commonly used for this stamp. The stamp is placed in a passport or another accepted document, depending on the circumstances and current agency guidance.
The key point is its role: it can provide temporary evidence when the person cannot rely on the physical card at that moment.
It is still not the same as the card. If someone asks whether an I-551 stamp is a green card, the careful answer is no. The stamp is temporary evidence of the status associated with the green card.
You may see people refer to this as a Temporary I-551. That phrase usually means temporary evidence of permanent resident status, not a separate permanent resident card with a different status.
Because the available information does not establish every rule for every situation, avoid assuming that a stamp will be accepted for every purpose. The agency, employer, airline, border official, or other organization reviewing the document may have current requirements that need to be checked directly.
When an endorsed immigrant visa can act as temporary evidence
A machine-readable immigrant visa may include wording stating that it serves as temporary I-551 evidence after endorsement.
A machine-readable visa is designed to be read by systems and officials. In this situation, the visa can do more than show information connected to immigration entry. After the required endorsement, the wording on it may identify the visa as temporary evidence of permanent resident status.
That does not make every immigrant visa a temporary I-551 document. The wording and endorsement matter.
This is another reason to read the document itself instead of relying only on a label. “Immigrant visa” and “I-551” are not automatically interchangeable terms. The document must contain the relevant indication that it serves as temporary I-551 evidence after endorsement.
If you need to know whether a particular visa can be used for a specific purpose, check current official immigration instructions. The facts supplied here establish the general role of an endorsed machine-readable immigrant visa, but they do not answer every question about use, timing, or travel.
Getting an I-551 stamp: what is clear and what is not
People often search for an I-551 stamp appointment after losing a green card or facing a delay. The available information confirms that the stamp is used as temporary proof of lawful permanent resident status in situations such as a lost, expired, or delayed physical card.
It does not provide a complete step-by-step process for getting the stamp.
That means you should not rely on a generic checklist that claims to cover every case. The current process may depend on the person’s situation and the immigration agency’s instructions. The supplied information does not confirm:
- How to request an appointment
- Whether an appointment is always required
- Which documents must be brought
- Whether a particular office handles the request
- How long the temporary evidence will remain valid
- What fees, if any, may apply
Those details need to be confirmed through current official U.S. immigration guidance. If your situation is urgent, use the agency’s current instructions rather than an old article, forum post, or informal checklist.
The safe distinction is simple: the research confirms what the stamp is for, but not a full application procedure.
I-551 and I-94 are not the same document
I-551 is not another name for I-94.
The supplied information identifies I-551 as the Permanent Resident Card or temporary evidence of lawful permanent resident status. It does not provide a detailed explanation of the I-94 or a full comparison between the two documents.
So don’t treat the labels as interchangeable just because both may appear in immigration records or travel-related paperwork.
If a form asks for an I-94 number, an I-551 Card number, or another immigration document number, read the request carefully. An I-551 Card number points to the Permanent Resident Card. An I-94 request is asking for something different.
When the wording on a form is unclear, check the form’s official instructions or ask the responsible agency. Guessing can lead you to enter the wrong number or attach the wrong document.
Can you travel with an I-551 stamp instead of the card?
An I-551 stamp may serve as temporary proof of permanent resident status when the physical green card is lost, expired, or delayed. But the supplied information does not establish specific travel rules.
So the answer is not a blanket yes.
Whether you can travel, return, or board transportation with an I-551 stamp may depend on current immigration and travel requirements, the wording on the stamp, the documents you hold, and the authorities reviewing them. The available facts do not support promising that travel will be accepted in every situation.
Before making travel plans, confirm the current requirements with official U.S. immigration and travel authorities. Check the exact document you have, including any wording, dates, and endorsements. If you are unsure, get official guidance before leaving rather than assuming that an I-551 stamp will be treated exactly like the physical green card.
That same caution applies to an endorsed immigrant visa. It may serve as temporary I-551 evidence, but the document’s wording and endorsement must be considered.
The main point is to match the name to the document: the green card is Form I-551, while an ADIT stamp and an endorsed immigrant visa may provide temporary I-551 evidence. For stamp requests, document use, and travel decisions, verify the current requirements through official U.S. immigration guidance before relying on temporary evidence.