Undocumented Men 18 to 25 Must Register for Selective Service

A caller asked immigration attorney Charles Kuck a question most people never think about: do undocumented young men have to register for Selective Service? The answer is yes, and it is not optional.

The requirement comes from the Military Selective Service Act, which obligates almost every man living in the United States to register within 30 days of turning 18. Selective Service itself is explicit that this includes undocumented immigrants, along with lawful permanent residents, refugees, asylees, and most other noncitizen men. Women are not required to register.

The reason it matters for immigrants is what happens later. Registration closes at age 26 (you cannot register after that), and a man who knowingly and willfully failed to register during the 18-to-25 window can be found to lack the good moral character that naturalization requires. In practice, that can push a green card holder’s citizenship eligibility years down the road. So a young man who registers now, even while undocumented, is protecting a future N-400 he may not be thinking about yet.

If you missed the window entirely, it is not automatically fatal. You can request a status information letter from Selective Service and explain that the failure was not knowing and willful, which is the same good-moral-character analysis that runs through other naturalization problems, from old citations and diversion agreements to back taxes on an N-400. And if citizenship is already on your horizon, the timing also matters because the N-400 fee is rising sharply.