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Decode Your USCIS Receipt Number: What LIN, SRC, EAC, WAC & IOE Mean!

USCIS receipt numbers, comprising service center codes, fiscal year, processing day, and unique ID, reveal case processing details. They indicate the handling center, application timing, and placement in queue, aiding in tracking immigration cases. Understanding these codes, differentiating between lockbox facilities and service centers, and utilizing the USCIS website can enhance case tracking efficiency.

Last updated: July 18, 2025 10:04 pm
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Key takeaways

USCIS receipt numbers reveal processing center, fiscal year, processing day, and unique petition identification for tracking applications efficiently.
Differentiate lockbox facilities from service centers for preliminary checks and in-depth reviews, aiding realistic processing time expectations.
Understanding USCIS receipt numbers aids in tracking case progress, allows center identification, timeline understanding, and facilitates communication with USCIS.

Decoding the Mysteries of USCIS Receipt Numbers

Have you ever found yourself staring at a USCIS receipt number and wondered what all those letters and numbers mean? Whether you’re an immigrant tracking the progress of your application or a lawyer handling multiple immigration cases, understanding USCIS receipt numbers (like LIN, SRC, EAC, WAC, IOE) can be crucial. Let’s unravel the mystery behind these codes and learn how to interpret them for efficient immigration case tracking.

Decode Your USCIS Receipt Number: What LIN, SRC, EAC, WAC & IOE Mean!
Decode Your USCIS Receipt Number: What LIN, SRC, EAC, WAC & IOE Mean!

What Do USCIS Receipt Numbers Signify?

At first glance, a USCIS receipt number might seem like a random string of characters. However, each segment of this number holds specific information regarding your case. Here’s a breakdown:

Service Center Identification

The initial three letters of your receipt number identify the USCIS service center responsible for processing your petition. Here’s a quick guide:

  • EAC/VSC: Vermont Service Center
  • WAC/CSC: California Service Center
  • LIN/NSC: Nebraska Service Center
  • SRC/TSC: Texas Service Center
  • MSC/NBC: National Benefits Center
  • IOE: Cases processed electronically or paper filings that have been electronically converted
  • YSC: Potomac Service Center

These service center codes are key to understanding where your case is being processed, an essential step for immigration case tracking.

Understanding the Fiscal Year

The next two digits represent the fiscal year in which the USCIS received your petition. For instance, if your receipt number includes “22,” it indicates that your petition was received during Fiscal Year 2022. Remember, the government’s fiscal year spans from October 1st until September 30th.

The Sequence of Processing

Following the fiscal year, the next three digits reveal the computer workday on which your receipt was generated, essentially showing when the USCIS processed your fee and started handling your case.

Finally, the last five digits uniquely identify your petition. These numbers are typically sequential, offering insight into how your case fits into the day’s processing schedule.

Lockbox Facilities vs. Service Centers: What’s the Difference?

When filing various USCIS forms, you might be directed to send your applications to a “lockbox” facility. But how does this differ from a service center?

Lockbox facilities act as frontline intake centers. They conduct preliminary checks to ensure your application is correctly filled and accompanied by the appropriate fees. Once everything is in order, your case gets a receipt number, is assigned to a service center, and then forwarded for in-depth review and adjudication.

Understanding this process is crucial, as it helps set realistic expectations regarding case processing times and facilitates more accurate immigration case tracking.

How Can This Information Help You?

Knowing how to read your USCIS receipt number allows you to:

  • Identify which service center is processing your case, giving you a better idea of where your application stands.
  • Understand the timeline of your case’s processing, through the fiscal year and workday digits.
  • Facilitate communication with USCIS, especially if you need to inquire about your case.

For those looking for further information on processing times and service center details, visiting the official USCIS website can be very insightful. Explore the USCIS Processing Times page for more detailed, up-to-date information on how long each center typically takes to process various applications.

Conclusion

Unpacking the complexity of USCIS receipt numbers (LIN, SRC, EAC, WAC, IOE) might seem daunting at first, but with the right knowledge, it becomes a powerful tool in tracking your immigration case’s progress. By deciphering the intricate codes and understanding the roles of different processing centers, you can gain clearer insights into the journey of your application through the USCIS system. Remember, each digit and letter is a stepping stone leading closer to the realization of your American dream.

This Article In A Nutshell:

Decipher USCIS receipt numbers (like LIN, SRC, EAC) for efficient case tracking. Codes reveal service center, fiscal year, processing sequence. Lockbox facilities ensure form accuracy before service center assignment. Utilize this info to monitor case status and engage with USCIS. Unlock the mysteries behind USCIS codes for a smoother immigration journey.
— By VisaVerge.com

Read more

  • Understanding the Importance of I-140 Receipt Number for Immigration Petition Tracking
    Track your USCIS case status with I-140 Receipt Number

  • How to Correct a Misspelled Name on I-485 Receipt or Notice
    USCIS Name Correction Guide for I-485 Receipt

  • Decoding the H1B Petition Request Number: A Guide for Applicants
    Understanding and Finding Your H1B Application Request Number

  • Verifying the Authenticity of Your H1B Visa Receipt Number: Step-by-Step Guide
    How to Validate Your H1B Visa Receipt Number Effectively

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Robert Pyne
ByRobert Pyne
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Robert Pyne, a Professional Writer at VisaVerge.com, brings a wealth of knowledge and a unique storytelling ability to the team. Specializing in long-form articles and in-depth analyses, Robert's writing offers comprehensive insights into various aspects of immigration and global travel. His work not only informs but also engages readers, providing them with a deeper understanding of the topics that matter most in the world of travel and immigration.
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