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Service Tree

The Service Tree lists all services in "branched" groups, starting with the very general and moving to the very specific. Click on the name of any group name to see the sub-groups available within it. Click on a service code to see its details and the providers who offer that service.

Citizenship and Immigration Services Offices

CIS National Headquarters

The main office of the Bureau of Citizenship and Immigration Services that establishes policy, makes regulations and provides guidance to CIS offices in the U.S. and abroad.

CIS Overseas Offices

Bureau of Citizenship and Immigration Services district offices located in Bangkok, Mexico City and Rome and sub offices in other locations which have jurisdiction over U.S. immigration issues outside the United States. The overseas offices are responsible for coordinating the adjudication of refugee status for individuals identified for possible refugee resettlement in the U.S.; deterring alien smuggling rings and other mechanisms for illegal entry into the United States; supervising pre-inspection offices in several overseas airports; and working with host country immigration and other law enforcement officials. The work of the overseas offices is directed and coordinated by the Director of International Affairs at the national headquarters in Washington, DC.

CIS Regional Service Centers

Bureau of Citizenship and Immigration Services offices with four locations throughout the U.S. that are responsible for receiving, reviewing and adjudicating the majority of applications for immigration services and benefits that are filed by petitioners. All applications must be submitted by mail or forwarded by other CIS offices. The service centers are not staffed to handle walk-in applications or answer questions.

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