The I-929 was missing a basic document, such as a copy of the U-1 holder's I-485 receipt or approval, proof of the family relationship, or the relative's identity papers. USCIS will hold the petition until you send it. Return everything with the cover page before the deadline.
In general, on any form:
USCIS mailed a notice asking for evidence that should have come with your filing. Something required was missing from the start, such as a document, photo or signature. The notice says what to send and the deadline. Answering on time keeps your case moving.
The I-929 was missing a basic document, such as a copy of the U-1 holder's I-485 receipt or approval, proof of the family relationship, or the relative's identity papers. USCIS will hold the petition until you send it. Return everything with the cover page before the deadline.
Initial evidence is something required with the original filing. An RFE asks for extra proof the officer needs.
Send what you have with an explanation and proof you tried to get the rest.
Usually yes. Not responding by the deadline often leads to denial.
The typical range published by USCIS is 32 to 41 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.