USCIS Reminds Foreign Nationals that Marijuana Violations May Prevent Eligibility for Naturalization
April 23, 2019

At a glance
Despite legalization in several U.S. states and foreign countries, the possession, use, sale, distribution and production of marijuana remain illegal under U.S. federal law and could render a foreign national unable to demonstrate “good moral character,” a key requirement of naturalization to U.S. citizenship.
The issue
U.S. Citizenship and Immigration Services (USCIS) has issued internal policy guidance reminding its adjudicators that, despite decriminalization of the possession, use, sale, distribution and production of marijuana by several U.S. states and foreign countries, these activities remain illegal under U.S. federal law and can prevent naturalization applicants from establishing the good moral character (GMC) required by law to become a U.S. citizen. This includes the use of medical marijuana.
The agency guidance does not reflect a change to U.S. naturalization law or its interpretation, but does highlight the risks of controlled substance use, even use that might be permissible under state law, as a potential bar to becoming a U.S. citizen.
Background
To qualify for naturalization, an applicant must show that he or she has been a person of good moral character, generally during the five-year period immediately preceding his or her application and up to taking the U.S. Oath of Allegiance (a three-year period in some cases). Conduct outside the five-year period can also impact a GMC finding, but U.S. regulations explicitly state that during the GMC statutory period, a person will be found to lack GMC if he or she has violated any federal, state, or foreign law relating to a controlled substance (provided the violation was not de minimis as defined by statute). Despite recent changes in some U.S. states that legalize marijuana within those jurisdictions, U.S. federal law still classifies marijuana as an illegal controlled substance.
What it means for foreign nationals
USCIS’s internal guidance does not change the legal requirements for naturalization. The guidance does, however, signal the Department of Homeland Security’s continued attention to the interaction between federal controlled substance law and recent state (and in some cases, foreign) marijuana legalization laws in the context of U.S. immigration and naturalization.
Foreign nationals on a path to naturalization should consult with counsel if they have questions regarding the intersection between naturalization and marijuana legalization.
This alert is for informational purposes only. If you have any questions, please contact the immigration professional with whom you work at Fragomen.
Explore more at Fragomen
Media mentions
Partner K. Edward Raleigh commented on proposed changes to US entry requirements.
Video
Business Immigration Consultant Marisa Gizzi from Fragomen explains everything about the Schengen C Visa: who needs it, how to apply and key travel tips to stay compliant in the Schengen Area.
Media mentions
Partner Rick Lamanna discussed Canada’s $1B plan to attract global researchers.
Blog post
Manager Alex Hood, Senior Associate Kimberley Ong and Immigration Paralegal Ataa Rajput explain the final extension and settlement deadlines for UK Tier 1 Investor visa holders and outline who can still qualify and why early action is essential.
Media mentions
Partner K. Edward Raleigh on how the $100K H‑1B fee factors into hiring international talent.
Media mentions
Managing Director Magdalene Tennant and Director Kitty Lo highlight Hong Kong as an attractive destination for global investors.
Blog post
IPM Business Process Manager Hazel Yaman outlines key visa, work authorisation and border considerations for athletes, media, event staff and spectators travelling to Italy for the Milan–Cortina 2026 Olympic and Paralympic Winter Games, including the impact of the EU’s new Entry/Exit System.
Media mentions
Corporate Services Director Elena Caron highlights key considerations for UK nationals moving to the UAE.
Media mentions
Associates Charlotte Roberts and Karina Casey highlight how the UK’s earned settlement proposal may influence global talent and HR planning.
Media mentions
Blog post
Associate Alejandro Hernandez analyses new F and J visa screening practices, including social media vetting by US consulates and proposed DHS changes that could significantly alter admission periods for students and exchange visitors.
Awards
Fragomen Ireland is accredited with IBEC’s KeepWell Mark™, recognizing the practice’s commitment to wellbeing, inclusion and responsible business.
Media mentions
Partner K. Edward Raleigh commented on proposed changes to US entry requirements.
Video
Business Immigration Consultant Marisa Gizzi from Fragomen explains everything about the Schengen C Visa: who needs it, how to apply and key travel tips to stay compliant in the Schengen Area.
Media mentions
Partner Rick Lamanna discussed Canada’s $1B plan to attract global researchers.
Blog post
Manager Alex Hood, Senior Associate Kimberley Ong and Immigration Paralegal Ataa Rajput explain the final extension and settlement deadlines for UK Tier 1 Investor visa holders and outline who can still qualify and why early action is essential.
Media mentions
Partner K. Edward Raleigh on how the $100K H‑1B fee factors into hiring international talent.
Media mentions
Managing Director Magdalene Tennant and Director Kitty Lo highlight Hong Kong as an attractive destination for global investors.
Blog post
IPM Business Process Manager Hazel Yaman outlines key visa, work authorisation and border considerations for athletes, media, event staff and spectators travelling to Italy for the Milan–Cortina 2026 Olympic and Paralympic Winter Games, including the impact of the EU’s new Entry/Exit System.
Media mentions
Corporate Services Director Elena Caron highlights key considerations for UK nationals moving to the UAE.
Media mentions
Associates Charlotte Roberts and Karina Casey highlight how the UK’s earned settlement proposal may influence global talent and HR planning.
Media mentions
Blog post
Associate Alejandro Hernandez analyses new F and J visa screening practices, including social media vetting by US consulates and proposed DHS changes that could significantly alter admission periods for students and exchange visitors.
Awards
Fragomen Ireland is accredited with IBEC’s KeepWell Mark™, recognizing the practice’s commitment to wellbeing, inclusion and responsible business.
