EB-1B Mailing Address: USCIS Lockbox Filing Guide

Where EB-1B Petitions Actually Go

A rejected EB-1B filing wastes weeks before you even know it never entered the system. USCIS does not process Form I-140 petitions at its service centers' public addresses — the agency routes them through regional lockbox facilities whose addresses change periodically, and the correct destination depends on where the petitioning employer is located and whether you paid for premium processing. The difference is the entire filing: a petition mailed to the wrong lockbox is returned unfiled, and the clock never starts.

The lockbox system exists to centralize intake, verify fee payments, and route cases to the appropriate service center for adjudication. For EB-1B petitions filed on Form I-140, two lockbox facilities handle the national workload: one in Texas, one in Nebraska. Which one your petition goes to is determined by the petitioner's geographic location as stated on the form, not by where the beneficiary lives or where the job is located. Premium processing petitions go to a different address at the same facility. Regular processing and premium processing petitions for the same employer at the same location still mail to different physical addresses.

The addresses below are verified against the USCIS Form I-140 instructions page as of January 2026. USCIS publishes address changes in updated form instructions and on the "Direct Filing Addresses" page at uscis.gov. Confirm the current addresses on the official I-140 instructions PDF before mailing your petition — the addresses in this article reflect the structure and assignment rules, but the street-level details are volatile.

USCIS Lockbox Assignment for EB-1B Petitions

EB-1B petitions file to one of two USCIS lockbox facilities based on the petitioner's location. The table below shows the current assignment structure as of January 2026:

The petitioner is the U.S. employer or institution filing the I-140, not the foreign national beneficiary. The lockbox assignment follows the employer's address as listed in Part 1 of Form I-140. If the beneficiary works remotely from one state and the employer's headquarters or the HR office signing the petition is in another, the employer's location determines the lockbox.

Courier and express delivery services (FedEx, UPS, DHL) require street addresses, not P.O. boxes. USCIS publishes separate courier addresses for lockbox filings on the same Form I-140 instructions page. Verify the current courier addresses before using express delivery — they are not the same as the P.O. box addresses and they differ between regular and premium processing.

The Premium Processing Address Difference

Premium processing for Form I-140 EB-1B petitions uses Form I-907 and carries an additional fee (as of January 2026, verify the current I-907 fee on the USCIS fee schedule before filing). Petitions requesting premium processing mail to a separate lockbox address at the same facility — the Phoenix lockbox uses different P.O. box numbers for regular and premium filings, and the Dallas lockbox does the same.

If you initially filed with regular processing and later decide to upgrade to premium, the upgrade request goes to the service center processing the petition, not to the lockbox. The lockbox handles intake only. Once USCIS issues a receipt notice with a case number, the case is at a service center (Texas Service Center or Nebraska Service Center), and premium processing upgrades file directly to that center. Consult the I-907 instructions and the USCIS premium processing page for current upgrade procedures and service center addresses.

How the Lockbox Routes EB-1B Cases After Intake

The lockbox does not adjudicate petitions. Its function is to receive the filing, verify the payment, scan the submission, issue a receipt notice, and forward the case file to the appropriate service center for review. For EB-1B petitions:

1. The lockbox receives the I-140 package.
2. Staff verify the filing fee payment (check, money order, or credit card authorization on Form G-1450).
3. The petition is scanned and entered into the case management system.
4. A receipt notice (Form I-797C) is generated and mailed to the petitioner, showing the case number, receipt date, and the service center that will adjudicate the petition.
5. The physical file is routed to Texas Service Center or Nebraska Service Center based on the petitioner's location.

The service center assignment follows the same geographic split as the lockbox: petitioners in the western states route to one center, all others route to the other. The receipt notice tells you which center received your case.

What Happens If You Mail to the Wrong Lockbox

USCIS does not forward misdirected I-140 petitions between lockboxes. A petition mailed to the Dallas lockbox when it should have gone to Phoenix, or vice versa, is returned to the sender as improperly filed. The return can take several weeks, and no receipt notice is issued because the petition never entered the system. You lose the time between mailing and receiving the rejection, and you must refile from the beginning with the correct address.

The filing date for an I-140 petition is the date USCIS receives the petition at the correct address, not the date you mailed it. If priority date retention or a deadline matters — concurrent H-1B extension filings, visa bulletin movement, AC21 portability windows — a rejected filing can cost the applicant their place in line.

Tracking EB-1B Petition Delivery

USCIS does not confirm receipt of a petition until it processes the filing and issues a receipt notice, typically 2–4 weeks after the lockbox receives the package. Petitioners can track delivery of the physical package by using USPS Certified Mail with return receipt, or a courier service with delivery confirmation. The tracking confirmation shows that the package arrived at the lockbox address, but it does not mean USCIS accepted the filing — acceptance depends on the petition being complete, the fee being correct, and the petition being filed at the right location.

If you have not received a receipt notice within 4–6 weeks of confirmed delivery, contact the USCIS Contact Center or use the e-Request system on uscis.gov to inquire about the status. Have the tracking number and the delivery confirmation date ready. USCIS may reject a petition after intake if it is incomplete or the fee is incorrect, and the rejection notice can arrive weeks after delivery.

Here's the Honest Answer: The Address Error Most Offices Make

Let's be direct: the most common EB-1B filing error is not the lockbox assignment itself — it's using an outdated address from a previous filing or copying the address from a blog post that doesn't carry an as-of date. USCIS changes lockbox addresses periodically, sometimes with only a notice on the form instructions page and no broader announcement. The Phoenix and Dallas lockboxes have been stable in their assignment rules (western states vs all others) since the current system launched, but the specific P.O. box numbers and courier street addresses change.

Employers who file multiple petitions often save the address from one filing and reuse it on the next without checking the current instructions. That works until it doesn't. Law offices that maintain petition templates face the same risk — a template built in 2024 with the correct address then may list an obsolete address now. The address that worked for your last EB-1B filing may not be current for this one.

The safeguard is simple: download the current Form I-140 instructions PDF from uscis.gov every time you prepare a filing. Scroll to the "Where to File" section and confirm the address before printing the mailing label. The PDF carries the revision date on the first page. If the revision date on your saved instructions is more than a few months old, download a fresh copy.

What If the Petitioner Has Multiple Locations?

Some universities, research institutions, and corporations have offices in multiple states. If the petitioner operates in both a western state (Arizona, California, Nevada, Hawaii, Guam) and another state, the lockbox assignment follows the address entered in Part 1, Question 3 of Form I-140 (the petitioner's physical address). If the institution's headquarters is in California but the beneficiary works at a branch campus in Texas, and the California office is the entity filing the petition and listed as the petitioner, the petition goes to the Phoenix lockbox. If the Texas branch is listed as the petitioner, it goes to Dallas.

The determination is the petitioner's stated address on the form, not the beneficiary's work location. If the petition lists multiple addresses for the petitioner (headquarters and branch), use the principal place of business or the address of the office authorized to sign the petition.

Comparison: Regular Mail vs Courier for EB-1B Petitions

Regular USPS delivery to the P.O. box address works for the majority of I-140 filings and costs less. Couriers to the street address provide faster confirmation of delivery, which matters if you are filing near a deadline or need documented proof of the delivery date (for example, maintaining H-1B status during an extension filed concurrently with the I-140, where the filing date determines the bridge period).

USCIS does not prioritize courier deliveries over regular mail in terms of processing sequence. Both enter the intake queue in the order the lockbox logs them, not the order they physically arrived at the building.

What If I Filed at the Wrong Address and Already Mailed It?

If you realize after mailing that you used the wrong lockbox address, you have two options:

1. Wait for the rejection and refile. USCIS will return the petition unfiled, typically within 3–6 weeks. When the package returns, verify the correct address on the current I-140 instructions and mail it again. The filing date will be the date the correct lockbox receives the refiled petition.

2. File a duplicate petition at the correct address immediately. This strategy makes sense only if the original filing date matters significantly (for example, you are approaching the end of H-1B time or a visa bulletin cutoff is imminent). Filing a duplicate means paying the I-140 fee twice. If USCIS processes both, you can withdraw one. If the first filing is rejected and returned before USCIS processes it, you lose only the time, not the fee (assuming you catch the rejection and request a refund before USCIS cashes the check for the misdirected filing, which is rare).

There is no mechanism to redirect a petition already in transit. USPS mail forwarding and package intercept services do not apply to USCIS lockbox addresses. Once the package is in the mail stream heading to the wrong facility, the only intervention is waiting for the return.

EB-1B Filing Checklist: Lockbox Address Verification

Before sealing the I-140 package:

• Downloaded the current Form I-140 instructions from uscis.gov (check the revision date on page 1)
• Identified the petitioner's location (the employer's address in Part 1 of the I-140)
• Confirmed whether premium processing is requested (affects the P.O. box number)
• Matched the petitioner's state to the lockbox assignment table in the instructions
• If mailing via USPS: using the P.O. Box address from the "Where to File" section
• If using a courier: using the street address from the "Where to File" section
• Verified the filing fee amount on the current USCIS fee schedule and included the correct payment
• If premium processing: included Form I-907 with the I-907 fee, and confirmed the petition goes to the premium-processing-specific address
• Double-checked the address label matches the instruction sheet exactly (address, city, ZIP, attention line)

The attention line matters. USCIS lockboxes process multiple form types at the same facility. The attention line ("Attn: I-140" or "Attn: I-140 Premium") routes the package to the correct intake team within the lockbox.

When the Lockbox Address Changes

USCIS announces lockbox address changes in updated form instructions, on the Direct Filing Addresses page, and occasionally through USCIS policy alerts or Federal Register notices. The agency does not individually notify petitioners of address changes. If you are working from a saved instruction sheet or a law office template, you will not know about the change unless you check for updates.

Address changes are not retroactive. A petition mailed to the address that was correct when you prepared it but obsolete when USCIS receives it may still be processed if the old address was valid at the time the petition was postmarked, or USCIS may return it and require refiling at the new address. The safest practice is to verify the address within 48 hours of mailing.

The Law Offices of Peter D. Chu monitors USCIS procedural updates and maintains current filing protocols for EB-1B petitions and other employment-based immigrant visa categories. Procedural errors — wrong address, incomplete forms, incorrect fees — are preventable, and they are the failures that cost applicants the most time.

Legal Disclaimer

This article provides general information about USCIS lockbox filing procedures for EB-1B petitions and is not legal advice. It does not create an attorney-client relationship between the reader and the Law Offices of Peter D. Chu. Immigration filing requirements, lockbox addresses, fees, and processing procedures change periodically. Verify all addresses, fees, and procedural requirements on uscis.gov before filing. Outcomes depend on the individual facts of each case, the completeness and accuracy of the petition, and current USCIS policies. Consult a licensed immigration attorney for advice specific to your situation.

For a comprehensive review of your EB-1B eligibility and filing strategy, schedule a consultation with the Law Offices of Peter D. Chu. The consultation fee is $250. Call 858-268-8823 or visit peterchu.com to schedule. Office hours are Monday through Friday, 8:30 AM to 5:30 PM, at 4615 Convoy St, San Diego, CA 92111.

Schedule a consultation with the Law Offices of Peter D. Chu — 4615 Convoy St, San Diego, CA 92111 · 858-268-8823 · Mon–Fri, 8:30 AM–5:30 PM. Consultation fee: $250.