Generally, a citizen of a foreign country who wishes to enter the United States must first obtain a visa which are a nonimmigrant visa for a temporary stay, or an immigrant visa for permanent residence.
Naturalization is the process by which U.S. citizenship is granted to a foreign citizen or national after he or she fulfills the requirements established by Congress in the Immigration and Nationality Act (INA).
The U nonimmigrant status (U visa) is set aside for victims of certain crimes who have suffered mental or physical abuse and are helpful to law enforcement or government officials in the investigation or prosecution of criminal activity.
If you are a U.S. citizen, and have interest in petitioning your Your unmarried sons or daughters 21 years of age or older, you must file a Form I-130 for each eligible relative.
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Response to Request for Evidence (“RFE”)
I-130, Petition for Alien Relative
If you are a U.S. citizen, and have interest in petitioning
Your brothers or sisters (21 years of age or older), you must file a separate Form I-130 for each eligible relative.
If you are a U.S. citizen, and have interest in petitioning your married sons or daughters of any age, you must file a separate Form I-130 for each eligible relative.