21.5 Immigration Law Basics

Key Takeaways

  • Immigration is one of the twenty-five areas of law NALS lists under Part 4 Legal Knowledge, and it is administered by several agencies across three federal departments.
  • Nonimmigrant visas authorize a temporary stay for a specific purpose, while immigrant visas lead to lawful permanent residence.
  • Immediate relatives of United States citizens are exempt from numerical limits, while family and employment preference categories are capped and subject to priority dates published in the monthly Visa Bulletin.
  • A person already in the United States in lawful status may pursue adjustment of status, while a person abroad uses consular processing through a United States consulate.
  • Immigration is among the highest-risk unauthorized practice areas for non-lawyers, and only attorneys and accredited representatives of recognized organizations may represent clients before USCIS and the immigration courts.
Last updated: September 2026

21.5 Immigration Law Basics

[!NOTE] NALS PP Exam Blueprint Focus: Immigration appears in the Part 4 Legal Knowledge list of areas of law. It carries a second, sharper significance for a PP candidate: immigration is the single most notorious unauthorized practice of law field in the United States, which connects it directly to the Part 3 ethics material.

The Agencies

Immigration functions are split across three departments, and knowing which agency does what is the first practical skill.

AgencyDepartmentFunction
U.S. Citizenship and Immigration Services (USCIS)Homeland SecurityAdjudicates benefits — petitions, applications, naturalization
Immigration and Customs Enforcement (ICE)Homeland SecurityInterior enforcement, detention, removal
Customs and Border Protection (CBP)Homeland SecurityPorts of entry and border inspection; admission decisions
Executive Office for Immigration Review (EOIR)JusticeThe immigration courts and the Board of Immigration Appeals
Department of StateStateConsulates abroad, visa issuance, the monthly Visa Bulletin
Department of LaborLaborLabor certification and labor condition applications

The governing statute is the Immigration and Nationality Act, codified in Title 8 of the United States Code, with implementing regulations in Title 8 of the Code of Federal Regulations.

Nonimmigrant Versus Immigrant

NonimmigrantImmigrant
PurposeTemporary stay for a specific purposePermanent residence
IntentMost categories require nonimmigrant intent — an intent to departPermanent intent
DocumentNonimmigrant visa and admission recordImmigrant visa or adjustment approval leading to a permanent resident card
DurationFixed period, with extensions possibleIndefinite, subject to abandonment and removal grounds

Common nonimmigrant categories include B-1 and B-2 for business visitors and tourists, F-1 for academic students, H-1B for specialty occupation workers, L-1 for intracompany transferees, O-1 for individuals of extraordinary ability, E-1 and E-2 for treaty traders and investors, TN for certain Canadian and Mexican professionals, J-1 for exchange visitors, K-1 for fiances of citizens, and U and T for certain crime and trafficking victims.

A handful of categories, notably H-1B and L-1, permit dual intent, meaning the holder may pursue permanent residence without undermining the nonimmigrant status.

[!TIP] The visa is not the status. A visa is a travel document issued by a consulate that permits a person to request admission at a port of entry. Status is what the person holds after CBP admits them, and it is recorded on the admission record with an authorized period of stay. A visa can expire while the person remains lawfully in status; conversely, a person can fall out of status while holding an unexpired visa.

Family-Based Immigration

CategoryWhoNumerical limit
Immediate relativesSpouses of U.S. citizens; unmarried children under 21 of U.S. citizens; parents of U.S. citizens aged 21 or olderNone — visas are always available
F1Unmarried adult sons and daughters of U.S. citizensCapped
F2ASpouses and minor children of permanent residentsCapped
F2BUnmarried adult sons and daughters of permanent residentsCapped
F3Married sons and daughters of U.S. citizensCapped
F4Brothers and sisters of adult U.S. citizensCapped

The absence of a numerical limit for immediate relatives is the single most consequential distinction in family immigration, because preference categories can carry waits measured in years or decades.

Employment-Based Immigration

CategoryWho
EB-1Extraordinary ability, outstanding professors and researchers, multinational executives and managers
EB-2Advanced degree professionals and persons of exceptional ability; national interest waiver available
EB-3Skilled workers, professionals, and other workers
EB-4Special immigrants, including certain religious workers
EB-5Immigrant investors meeting capital and job-creation requirements

Most EB-2 and EB-3 cases require PERM labor certification from the Department of Labor, in which the employer tests the labor market through prescribed recruitment and attests that no able, willing, qualified, and available United States worker exists for the position and that hiring the foreign worker will not adversely affect wages and working conditions.

Priority Dates and the Visa Bulletin

The priority date is a person's place in line — generally the date the petition was filed, or the date the labor certification was filed in PERM cases. Each month the Department of State publishes a Visa Bulletin showing cutoff dates by category and country of chargeability. A visa is available when the priority date is earlier than the cutoff date, at which point the case is described as current.

Because per-country limits apply, applicants chargeable to high-demand countries can face far longer waits in the same category than applicants from elsewhere. Cutoff dates can also retrogress, moving backward when demand exceeds supply, which is why a paralegal never treats a currently available priority date as permanently available.

Adjustment of Status Versus Consular Processing

Adjustment of statusConsular processing
WhereInside the United States, through USCISAt a United States consulate abroad
WhoA person present in the U.S. who is eligible, generally requiring lawful admission or parole and maintenance of status, with exceptions for immediate relativesA person abroad, or one ineligible to adjust
Ancillary benefitsWork authorization and advance parole available while pendingNone during the wait
ReviewMotions and, in some postures, reviewConsular decisions are largely unreviewable

A critical trap: departing the United States while an adjustment application is pending, without advance parole, generally abandons the application. A separate and severe trap is the unlawful presence bar — accruing more than 180 days or one year of unlawful presence and then departing triggers a three-year or ten-year bar on return, which can convert a straightforward consular case into a decade-long separation. Waivers exist but require a qualifying relative and a showing of extreme hardship.

Naturalization

General requirements for naturalization:

RequirementStandard
Lawful permanent residenceGenerally 5 years, reduced to 3 years for a person married to and living with the same U.S. citizen spouse
Continuous residenceMaintained during the statutory period; long absences can break it
Physical presencePresent in the United States at least half the statutory period
State or district residenceOrdinarily three months before filing
Good moral characterDuring the statutory period, with certain permanent bars
English and civicsReading, writing, speaking, plus United States history and government, with age and disability exceptions
Attachment and oathAttachment to constitutional principles and the oath of allegiance

Derivative and acquired citizenship rules can make a person a citizen already, through a parent, without any application — which is why a competent intake asks about parents' citizenship before assuming a naturalization case.

Removal Proceedings

Removal begins with a Notice to Appear filed with the immigration court, charging the grounds of inadmissibility or deportability. Proceedings run before an immigration judge, with appeal to the Board of Immigration Appeals and then a petition for review in the federal court of appeals.

ReliefCore requirement
AsylumWell-founded fear of persecution on account of race, religion, nationality, political opinion, or membership in a particular social group; a one-year filing deadline from arrival, with exceptions
Withholding of removalA higher probability standard than asylum, but mandatory when met
Protection under the Convention Against TortureLikelihood of torture with government acquiescence
Cancellation of removalDistinct standards for permanent residents and non-permanent residents, including continuous physical presence and hardship requirements
Adjustment of statusAvailable in proceedings where the person is otherwise eligible
Voluntary departureDeparture at one's own expense, avoiding a removal order
WaiversStatutory waivers of specific inadmissibility grounds

[!WARNING] There is no right to appointed counsel in immigration proceedings. A respondent may be represented at no expense to the government, which is why access to competent representation is the central practical problem in the field and why fraudulent providers find so much opportunity.

Unauthorized Practice: The Immigration Problem

Only attorneys and accredited representatives of organizations recognized by the Department of Justice may represent clients before USCIS and the immigration courts.

The recurring fraud is the notario público problem. In many Latin American legal systems a notario público is a licensed legal professional with substantial authority. In the United States a notary public is authorized only to witness signatures and administer oaths. Non-lawyers exploiting that mismatch have caused enormous harm, including missed deadlines, meritless filings that trigger removal proceedings, and permanent bars created by bad advice.

A paralegal mayA paralegal may not
Gather documents and biographic informationSelect the visa category or immigration strategy
Prepare forms for attorney review and signatureAdvise on eligibility or the likelihood of approval
Translate and interpret, and arrange certified translationsSign forms as a preparer holding out as authorized to represent
Track priority dates, receipt notices, and deadlinesAppear before USCIS or the immigration court as a representative
Explain what a notice says the agency has decidedExplain what a client should do about it
Use a title that accurately states the roleUse "notario," "immigration consultant," or any title implying authority to advise

Many states have enacted specific immigration consultant statutes with criminal penalties, precisely because this area has produced so much non-lawyer harm.

The Paralegal Workstream

  1. Deadline and receipt tracking — receipt and approval notices, requests for evidence with hard response deadlines, biometrics appointments, hearing dates, the asylum one-year deadline.
  2. Visa Bulletin monitoring — checking cutoff movement monthly against the case inventory and flagging retrogression.
  3. Document assembly — civil documents, certified translations, medical examinations, police certificates, and supporting evidence.
  4. Employer support in PERM cases — recruitment documentation, prevailing wage tracking, audit file maintenance.
  5. Status calendar — expiration dates for every nonimmigrant client, with extension filings calendared well in advance.
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Immigration Pathways and the Practice Boundary
Test Your Knowledge

A United States citizen files a petition for her 34-year-old married son and, separately, for her 68-year-old mother. What is the difference in how the two cases proceed?

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Test Your Knowledge

A client with a pending adjustment of status application asks a paralegal whether she can travel abroad for two weeks to attend a family funeral. What is the correct handling?

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Test Your Knowledge

A community organization advertises "immigration services" and a staff member who is a notary public prepares and files asylum applications for a fee while calling herself a notario público. What is the legal problem?

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