An "expungement" is the deletion of a person's entire criminal conviction record from any court, police record, or criminal justice agency. Different U.S. states take different approaches to expungement, but in general if the court expunges your criminal record, then within the context of the criminal justice system, you are considered to never have committed a crime at all.
In the immigration context, however, it's a different matter. Though expungement might seem like a blessing, given that a criminal conviction can prevent a foreign national from entering the United States or cause a foreign national to be deported from the United States, it doesn't necessarily work that way. For immigration purposes a criminal conviction will always exist, expunged or not.
That said, if you do have a criminal record, you might still be able to immigrate to the United States. It depends on such factors as the facts or your case, the nature of the crime, and the sentence.
If you have been convicted of a crime in either your home country or the U.S., you might be "inadmissible" to the United States. Being inadmissible means that even if you meet the basic qualifications for a visa or green card, immigration officials can or must still refuse to let you enter the country because of some condition in your past. Even if your criminal record is expunged, you might still be found inadmissible because of your conviction.
However, immigration law provides various "waivers" of inadmissibility. If you apply for and are granted a waiver, then you will be allowed to enter the U.S. notwithstanding your criminal conviction.
To obtain a nonimmigrant waiver (which allows you to obtain a nonimmigrant, temporary visa such as a B-1 or B-2 visitor visa or an H-1B visa to enter the U.S.), you must prove to the U.S. government that your entry would not threaten the country or its citizens. To do so, you must file a waiver application that addresses the following three criteria:
The Board of Immigration Appeals (B.I.A.) outlined these criteria in the immigration case Matter of Hranka, so the nonimmigrant waiver is sometimes referred to as the Hranka waiver. The U.S. consulate in your home country can provide you with detailed information on how to file a Hranka waiver application, and typically you file it with that consulate.
If the consulate recommends that the U.S. government grant the waiver, the consulate will forward your application to the Admissibility Review Office (ARO). If the ARO grants your waiver, the consulate will issue your visa and you can enter the United States.
You will also need a waiver to enter the U.S. if you are immigrating (obtaining a green card or immigrant visa). The immigrant waiver is called an I-601 waiver. Not just anyone can apply for an I-601 waiver. To apply, the applicant must have a "qualifying relative," which means a U.S. citizen or lawful permanent resident spouse, parent, or child (the child must be both unmarried and under the age of 21 to be a qualifying relative).
In addition to having a qualifying relative, the applicant must show that the qualifying relative would suffer extreme hardship if the U.S. refused to let the applicant enter the country.
An applicant files an I-601 waiver application at a U.S. consulate abroad. . It is highly recommended you consult an immigration attorney before preparing and filing an I-601 waiver application, as it involves a great deal of paperwork and drafting persuasive arguments.
If you are convicted of a crime while you are lawfully in the U.S., the government may deport you back to your home country. Deportation can happen to two types of foreign nationals:
Of course, deportation can always happen to foreign nationals who are in the country illegally, whether they've been convicted of a crime or not.
First, if you commit a crime while in the U.S. with a nonimmigrant visa, the government takes the view that you have violated the conditions of your visa and should be deported. It might be possible to avoid deportation, but you must contact a skilled immigration attorney specializing in criminal convictions in order to remain in the country.
Second, if you have a green card, committing a crime can result in the loss of your green card and deportation (removal). It might be possible to avoid deportation, but anyone in this situation should contact an immigration attorney who can assist with this serious issue.