U.S. embassies and consulates overseas assist the Selective Service System with its registration program abroad.
Under current law, all male US citizens are required to register with the US Selective Service System within 30 days of their 18th birthday.
At the present time there is no obligation to serve (induction), but registering for the draft is still required by law for all men between the ages of 18 and 25, including US citizens living abroad. In addition, non-US-citizen males between the ages of 18 and 25 (inclusive) living in the United States must register. This includes permanent residents (holders of green cards), refugees, asylees, and other immigrants. Foreign males lawfully present in the United States who are non-immigrants, such as international students, visitors, and diplomats, are not required to register.
Failure to register as required is grounds for denial of certain government benefits and financial aid, most federal employment, and, if the person is an immigrant, can deny eligibility for US citizenship. Those who were required to register, but failed to do so before they turn 26, are no longer allowed to register, and thus may be permanently barred.
Until their 26th birthday, registered males must notify Selective Service within ten days of any changes to information regarding his status, such as name, current mailing address, and permanent residence address.
A dual national with U.S. nationality must register with Selective Service. Some countries have agreements with the US which exempt them from military service in the US Armed Forces. An immigrant who requests and is exempt under an agreement or bilateral treaty can never be naturalized as a US citizen, and may have trouble reentering the US if he leaves.
For more information, see the Selective Service System website http://www.sss.gov.