A number USCIS refers to the unique identifier assigned to certain immigration filings and case records. This numeric code helps applicants, attorneys, and agencies track the status of petitions, applications, and related adjudication processes.
Understanding the context and format of this identifier reduces confusion when reviewing case updates online or communicating with service centers. The following sections explain where it appears, how it is used, and how to verify its current standing.
| Identifier Type | Where It Appears | Primary Purpose | Typical Format |
|---|---|---|---|
| Receipt Number | Form I-797, I-129, I-140, I-485 notices | Confirm that USCIS received a filing | LOA123456789AB |
| Case Number | Online account, appointment letters, biometrics | Track case progress and correspondence | MSCChicagoLXXXXXXX |
| Service Center Code | Check address guides, confirmation pages | Routing of applications to correct facility | WAC, LIN, SLC, VSC |
| CBP Admission Record | I-94 printout, CBP One history | Entry and parole verification | 9999999999 |
Receipt Numbers and Initial Filing Tracking
Structure and Validation
The receipt number is the first numeric-related identifier issued when USCIS accepts a form. It appears on the filing notice and can be entered into the USCIS online case tracker to monitor status changes. Verifying the prefix ensures you are reviewing the correct immigration process.
Case Numbers and Internal References
Adjudication Workflow
Once a receipt number is processed, USCIS assigns a case number to link all internal actions. This number is used in biometrics appointments, office visit notices, and decisions. Keeping this number handy helps applicants reference specific steps in the adjudication history.
Service Center and Facility Codes
Geographic Routing
Each petition or application is routed to a designated service center or lockbox. Facility codes indicate where forms should be mailed and where officers review cases. Using the correct code prevents delays caused by misdirected paperwork.
CBI and Entry Related Identifiers
Border and Arrival Records
For individuals entering the United States or adjusting status based on prior parole, CBP provides an admission record number. This numeric string verifies lawful entry and may be needed when applying for benefits or changing status. Cross-checking this data ensures consistency across immigration records.
Key Takeaways and Recommendations
- Always save the receipt number and case number provided in USCIS notices.
- Use the official USCIS website to verify status before contacting customer service.
- Ensure mailing addresses match the facility code to prevent processing delays.
- Cross-reference entry records when adjusting status to avoid discrepancies.
FAQ
Reader questions
Where can I locate the receipt number on my forms?
You can locate the receipt number on the filing confirmation page, the top or bottom of your form notice, and in the USCIS online account under the correspondence section.
Is the case number the same as the receipt number?
No, the case number is assigned after receipt to track adjudication, while the receipt number confirms initial filing and appears on the original submission notice.
What should I do if my case number is not showing online status?
Check for typos, wait 72 hours after biometrics, use the exact case number format, and contact the designated USCIS contact if the record remains missing.
Do biometric appointment letters always include a numeric identifier?
Yes, biometric appointment letters include a case number or USCIS ID to link the appointment to your specific application or petition.