Definition
F4 Preference
Family-based: brothers and sisters of adult U.S. citizens.
F4 allows U.S. citizens age 21 or older to sponsor their siblings. Waits are among the longest in the immigration system — often 14 to 20+ years worldwide and even longer for Mexico and the Philippines.
More immigration terms
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Federal Bureau of Investigation
The U.S. law enforcement agency that conducts background checks for USCIS cases.
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Fee Waiver
A waiver of USCIS filing fees for low-income applicants who file Form I-912.
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Final Action Date
The Visa Bulletin cutoff for when a green card can actually be issued.
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Form AR-11
Alien's Change of Address Card.
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Form I-129F
Petition for Alien Fiancé(e) — starts the K-1 visa process.
Not legal advice. Definitions are provided for educational use. For case-specific guidance, consult a licensed immigration attorney.