“Case Accepted By The USCIS Lockbox”on your N-600 · Proof of citizenship through parents
The USCIS lockbox accepted your paper N-600 and is processing payment.
The USCIS lockbox accepted your paper N-600 and is processing payment. A receipt notice comes next. Keep copies of everything you sent, since N-600 evidence like old family records can be hard to replace. Never send originals unless asked.
In general, on any form:
The USCIS Lockbox, the facility that receives mailed filings and payments, accepted your package. Your fee was processed and the case is being entered into the system. A receipt notice usually follows. This is the very first intake step.
The USCIS lockbox accepted your paper N-600 and is processing payment. A receipt notice comes next. Keep copies of everything you sent, since N-600 evidence like old family records can be hard to replace. Never send originals unless asked.
It is the facility that opens mailed filings, takes payments and sends cases into the system.
No. It only means your package passed the first intake check.
Usually within a few weeks after the Lockbox accepts the case.
The typical range published by USCIS is 11 to 12 months. It depends on the office and your case; it is not an exact date.
AI-assisted explanation based on the official USCIS status, reviewed by CaseAlerta. Not legal advice. Times are typical ranges, never an exact date.