What Do the Numbers in Your USCIS Receipt Number Mean?

Quick answer: A USCIS receipt number is a 13-character code made of three letters followed by 10 digits, like WAC2612345678. The three letters identify the service center that took in your case, and the 10 digits break down into a two-digit fiscal year, a three-digit computer workday, and a five-digit case number. There's no hidden information about your approval odds or timeline buried in the number itself — it's essentially a tracking ID, similar to a package tracking number.

Key takeaways

• A receipt number follows the pattern 3 letters + 10 digits, for example EAC2412345678 or SRC2598765432.
• The first three letters identify the USCIS service center or facility that received your case, not your local field office.
• The next two digits are the fiscal year USCIS received your case, the next three are the computer workday it was taken in, and the last five are a case number assigned in sequence — none of them reflect priority, complexity, or how fast your case will move.
• You can check what your specific receipt number's status message means using the USCIS Case Status Online tool or a tracker like MyCheck that monitors it for you automatically.

What are the three letters at the start of my receipt number?

The three letters at the start of your receipt number identify which USCIS service center or facility processed your filing — they have nothing to do with your local USCIS office or the office handling your interview. USCIS operates several regional service centers plus specialized processing facilities, and each one has its own letter code.

Common prefixes you'll see include:

If your receipt number starts with IOE, that simply means you filed online rather than by paper. It doesn't indicate a different or faster process. USCIS has opened online filing to more form types over time, so IOE numbers are increasingly common.

One thing to keep in mind: the service center that receives your case isn't necessarily the one that keeps it. USCIS regularly moves cases between centers to balance workloads, and you'll see this reflected in a status message called Case Was Transferred And A New Office Has Jurisdiction if it happens to you. Your receipt number doesn't change when that happens — the letters just tell you where the case started.

What do the digits after the letters mean?

The ten digits following the three letters break into a fiscal year, a computer workday, and a case number, and none of them tells you anything about your place in line relative to other applicants. Here's how to read them:

• First two digits (positions 4–5): the fiscal year your case was received into USCIS's system. The federal fiscal year runs October 1 through September 30, so a case received in November 2026 would carry a "27" fiscal year code, not "26."
• Next three digits (positions 6–8): the computer workday — the numbered intake day of that fiscal year on which USCIS took in your case and fee. "123" means the 123rd intake workday, not a calendar date.
• Last five digits (positions 9–13): a case number assigned in sequence as cases are processed at the intake facility.

So in a receipt number like EAC2612345678, "EAC" is the Vermont Service Center, "26" is fiscal year 2026, "123" is the 123rd intake workday of that fiscal year, and "45678" is the case number assigned at intake.

Don't skip this: a lower sequence number does not mean your case will be decided faster than one with a higher number. USCIS processes cases based on factors like form type, workload at that specific center, and whether biometrics or additional evidence are needed — not strictly in the order receipt numbers were issued.

Does my receipt number tell me how long processing will take?

No — the receipt number itself carries no processing-time information; you have to look up your form type and service center separately using USCIS's published data. USCIS publishes processing time ranges by form and office on its Check Case Processing Times page, updated periodically, and these ranges can shift as workloads change.

This is also where a tracker becomes useful beyond decoding the letters. MyCheck watches your receipt number and tells you in the app and by email when the status changes, so you're not stuck refreshing a browser tab. MyCheck Premium also shows the processing times USCIS publishes for your form next to your case, so you don't have to cross-reference the tables yourself.

A few things that genuinely do affect your timeline, separate from anything encoded in the receipt number:

• Form type. An I-765 (work permit) generally moves differently than an I-485 (adjustment of status) or an N-400 (naturalization), because each goes through different internal review steps.
• Service center workload. Two identical forms filed the same week at different centers can take noticeably different amounts of time to clear, simply based on that center's caseload.
• Requests for evidence. If your status changes to Request For Additional Evidence Was Sent, your timeline resets in part while they wait for your response — and once you reply, you may see a Response To USCIS Request For Evidence Was Received update followed by a period with no visible movement, which is normal and doesn't mean it was lost.
• Biometrics and interviews. Cases requiring an in-person interview add scheduling time that a straightforward paper-review case wouldn't have.

Why does my status say something different from what the letters suggest?

Your receipt number and your case status message are two completely separate pieces of information, and confusing them is one of the most common sources of anxiety for applicants. The receipt number is fixed once assigned — it doesn't update or change as your case moves through the system (unless your case is transferred to a new center, and even then most people keep the same number).

The status message attached to that number, on the other hand, updates as your case progresses. You might see messages like:

• Case Was Received
• Fingerprint Fee Was Received
• Case Was Updated To Show Fingerprints Were Taken
• Case Is Being Actively Reviewed By USCIS
• Case Is Ready To Be Scheduled For An Interview
• Interview Was Scheduled
• Case Was Approved

Each of these has a distinct meaning, and USCIS's language around them can be more or less specific depending on the form. If you're seeing a message you don't recognize, it's worth looking up exactly what it means for your form type rather than guessing. USCIS status wording is standardized, but what triggers each message can differ between an I-130 and an I-485, for example. Each message above links to a plain-English explanation of what it means and what usually comes next.

Sometimes a tracker says your case was updated while the status message stays the same. That's a date change on the case record, not a new stage, and it's covered in Why Your I-485 Tracker Changed Dates, Not Status.

Why does USCIS say my receipt number is invalid?

Usually because of how it was typed, or because it isn't a USCIS receipt number at all. USCIS's case status guidance says a receipt number is three letters followed by 10 numbers, and that you should leave out dashes when you enter it. Other characters, including asterisks, can stay in.

Before you worry, check these:

• Dashes or spaces. Type it as one unbroken string: `EAC2612345678`, not `EAC-26-123-45678`.
• Letters and digits mixed up. Only the first three characters are letters. A letter O or I in the last ten should be the digits 0 or 1.
• The wrong number. Your A-number (on a green card or EAD), your USCIS online account number and a State Department number such as an NVC case number or a DS-160 confirmation are not receipt numbers. They won't work in Case Status Online.
• The wrong notice. Use the receipt number printed on your Form I-797 notice for the specific case you want to check. If you filed several forms together, each one has its own.

If the number is typed correctly and still isn't found, compare it character by character against the paper notice. A single wrong digit will return an error or someone else's case type.

Can I use my receipt number to check my case anytime?

Yes — your 13-character receipt number is the exact code USCIS's Case Status Online tool needs to pull up your file, and you can check it as often as you'd like at no cost. There's no limit on how many times you can look it up, and checking frequently doesn't affect your case in any way.

That said, manually checking every day can become a source of stress rather than reassurance, especially during long stretches where nothing changes. This is exactly the gap an automated tracker fills — instead of you initiating the check, the system does it in the background and only alerts you when there's actually something new to see.

Before you start tracking, here's a quick checklist to make sure you have what you need:

• Locate your I-797 receipt notice — it's the paper USCIS mailed after receiving your form, and your receipt number is printed at the top.
• Confirm all 13 characters are entered correctly, since a single wrong digit will return a "not found" error.
• Note your form type (I-130, I-485, I-765, N-400, etc.) so you can compare against the right USCIS processing-time table.
• Double-check whether your number starts with IOE, which means you'll manage the case primarily through your USCIS online account rather than by receipt number alone.
• Set up a notification method — email, text, or an app — so you're not manually refreshing a page every few days.

If you're navigating this process for the first time, or juggling multiple family members' cases at once, keeping the receipt numbers, statuses, and next steps straight can get overwhelming fast. MyCheck was built for exactly this — it tracks your case automatically, translates confusing status messages into plain English, and builds an AI checklist based on your specific visa type, so you always know what's next without digging through USCIS pages yourself. The free tier covers tracking for one case, which is a solid starting point if you're just getting your bearings.

Whatever stage you're at — waiting on a receipt notice, staring at an unfamiliar status update, or wondering why your case has sat quietly for weeks — you don't have to piece it together alone. Take a look at MyCheck and see whether automatic tracking takes some of the guesswork off your plate.

Related articles

• Why Your I-485 Tracker Changed Dates, Not Status
• Every USCIS Case Status Message, Decoded
• What It Means When USCIS Transfers Your Case