Potomac Service Center

Location: Arlington, Virginia

The Potomac Service Center handles cases filed electronically through the USCIS online system. Receipt numbers starting with "IOE" are processed here. As USCIS moves toward digital processing, an increasing number of cases are routed through this center.

Receipt Number Prefixes

Cases processed at the Potomac Service Center use the following receipt number prefixes:

• IOE — e.g., IOE0912345678

Common Forms Processed

The Potomac Service Center regularly processes the following USCIS form types:

• I-485 — Application to Register Permanent Residence or Adjust Status
• I-130 — Petition for Alien Relative
• I-765 — Application for Employment Authorization
• I-131 — Application for Travel Document (Advance Parole)
• N-400 — Application for Naturalization
• I-90 — Application to Replace Permanent Resident Card

Key Information

• Receipt numbers start with "IOE" for electronically filed cases
• Handles an increasing share of all USCIS applications as online filing expands
• Cases may be transferred to field offices for interviews
• IOE cases can sometimes process faster due to the digital workflow

Track Your Case

Have a receipt number starting with IOE? Look up your case status instantly.