To determine the feasibility and utility of implementing a requirement that each nonimmigrant alien annually report a current address, we reviewed available documents concerning nonimmigrant alien address reporting requirements and interviewed headquarters officials from USCIS and ICE. At USCIS headquarters, we interviewed senior officials who were responsible for alien records management and benefit administration. At ICE headquarters, we interviewed two senior officials who were responsible for ICE compliance enforcement activities related to aliens. We also interviewed 15 ICE Assistant Special-Agents-in-Charge, supervisors, and special agents who are responsible for immigration enforcement activities in their Detroit, Michigan; Houston, Texas; Los Angeles, California; Miami, Florida; and New York, New York field offices. These offices, according to DHS data, are located in geographic regions where almost half of nonimmigrants likely to be subject to an annual address reporting requirement reside. The results of our interviews with agents in these five field offices may not be representative of the views and opinions of those in other field offices nationwide. We also interviewed an official from the Federal Bureau of Investigation’s (FBI) Foreign Terrorist Tracking Task Force (FTTTF). USCIS’s ORS staff provided cost estimates for existing change of address processing costs and for an annual nonimmigrant alien address reporting requirement. We attempted to obtain supporting explanations and documentation to verify these estimates, but were not provided information on all. On the basis of our efforts to determine the reliability of the estimates for which supporting information was provided, which included verifying calculations and bringing any discrepancies we found to their attention, we believe that they are sufficiently reliable for the purposes of this report. We did not use cost estimates for which supporting information was not provided. Through initial registration and change of address notifications, all aliens are to provide their identity and an address where they can be located while in the United States. USCIS receives and maintains alien address information for benefits administration and immigration law enforcement, and can share this information to help other law enforcement agencies identify and locate aliens for national security purposes. Generally, nonimmigrant aliens provide their identity and address information at the time of their entry and during their stay in the United States using 1 of 12 different forms. For example, nonimmigrant aliens arriving in the United States are generally required to complete the two- part Arrival and Departure Record (Form I-94). The first part records nonimmigrant aliens’ arrivals and includes the nonimmigrant alien’s address in the United States. The second part is to be surrendered when nonimmigrant aliens leave the country. DHS is to match the first and second parts of the Form I-94 to identify those nonimmigrant aliens who have left the country. However, as we reported in May 2004 and DOJ’s Inspector General reported in 1997 and 2002, legacy INS lacked many Form I-94 departure records, and as a result, INS could not identify all of the nonimmigrant aliens who had left the country. Over the years, Congress established various requirements for immigrant and nonimmigrant aliens to report their addresses while residing in the United States. Currently, aliens are generally required to report their change of address to USCIS within 10 days of moving. Failure to report a change of address can result in an alien being taken into custody and placed in removal proceedings before an immigration judge. The alien can be fined, imprisoned for not more than 30 days, or removed. Because legacy INS did not inform aliens of change of address notification requirements when they entered the country, in our November 2002 report, we recommended that legacy INS publicize change of address notification requirements nationwide. According to USCIS officials, as of November 2004 this recommendation was not implemented because USCIS was in the process of revising the change of address form used by aliens and did not want to begin publicity efforts until the revised form was finalized. Figure 1 shows the evolution of nonimmigrant alien reporting requirements, beginning with the establishment of the Alien Registration Act of 1940 to the present, with the 1981 amendments marking when annual reporting requirements of nonimmigrant aliens were repealed. Although Congress, in 1981, eliminated the requirements that all aliens annually report their addresses and that nonimmigrants report their address every 90 days, Congress, through various acts, reinforced the importance of the government being able to identify the lawful entry of nonimmigrants into the United States. Specifically, prior to the terrorist attacks of September 11, 2001, Congress mandated that INS improve its ability to identify nonimmigrant aliens who arrive and depart the United States and who overstay their visas. The Illegal Immigration Reform and Immigrant Responsibility Act of 1996, for example, authorized the Attorney General to establish an electronic student tracking system to verify and monitor the foreign student and exchange visitor information program and develop an entry and exit control system to collect arrival and departure records for every alien entering and leaving the United States. After September 11, 2001, the USA PATRIOT Act, enacted in October 2001, re-emphasized the speedy implementation of an entry-exit system for U.S. visitors. In August 2002, DOJ issued a rule that became effective September 11, 2002, concerning the registration and monitoring of certain nonimmigrants. Under this rule, DOJ imposed special requirements on nonimmigrants from designated countries. For nonimmigrant aliens arriving in the United States, these requirements included being fingerprinted and photographed at the port of entry. The rule also required nonimmigrant aliens to reregister after 30 days and annually. In December 2003, DHS issued an interim rule suspending the 30-day and annual reregistration requirements that were in effect prior to that date. DHS determined that its United States Visitor and Immigrant Status Indicator Technology (US-VISIT) program and other new processes being implemented would meet the national security needs. Consistent with the above registration requirements, US-VISIT is part of the U.S. security measures for all visitors (with limited exemptions) holding nonimmigrant visas, regardless of country of origin. Specifically, US-VISIT’s program objectives include (1) collecting, maintaining, and sharing information (including address data) on aliens who enter and exit the United States; (2) identifying aliens who have violated the terms of their visit; and (3) detecting fraudulent travel documents, verifying traveler identity, and determining traveler admissibility through the use of biometrics. USCIS officials told us that it would be technically feasible to implement an annual nonimmigrant alien address reporting requirement. The officials said that the current NIIS system for processing alien change of address forms could be upgraded to facilitate the nearly fourfold increase in processing volume that likely could result from implementing an annual nonimmigrant alien address reporting requirement. USCIS currently processes about 550,000 nonimmigrant change of address forms each year, and the officials estimated that about 2.6 million nonimmigrants could be required to report under an annual requirement. The officials estimated that an increase of over 2 million address reporting forms would increase USCIS’s current annual change of address form processing costs from about $1.6 million to at least $4.6 million per year. The estimate of the cost increase includes computer operations and maintenance, printing of address reporting forms, and additional data entry staff. USCIS’s estimate does not include the potentially substantial cost of enforcing the address reporting requirement, which would include hiring, training, and compensating additional ICE agents. USCIS is considering incorporating the current NIIS change of address system into the US-VISIT program. On October 4, 2004, officials from USCIS formally requested that DHS move responsibility for all alien change of address registration from USCIS’s ORS to the US-VISIT program. Although US-VISIT officials told us that placement of nonimmigrant change of address information responsibility within US-VISIT might be a viable option, the program is not currently designed to monitor aliens during their stay in the United States. These officials told us that incorporating address change data into the US-VISIT program would require a change in US-VISIT program requirements, including changes in US-VISIT’s budget and technical requirements. As of November 2004, DHS officials had not made a decision whether to integrate address change data into US-VISIT. Sixteen of the 17 ICE agents we contacted in headquarters and in the field said that implementing an annual nonimmigrant alien address reporting requirement would have limited utility in assisting them in locating nonimmigrant aliens because the annual registration is based on self- reported information. ICE agents in Houston, Texas; Los Angeles, California; Miami, Florida; and New York, New York, responsible for immigration enforcement activities said that when conducting investigations, they do not use the NIIS change of address data currently submitted by nonimmigrants to help locate nonimmigrants as part of their investigations. They said that because the change of address information is self-reported data, it is often less reliable than data from other databases. According to the agents, nonimmigrants who intentionally are not in compliance with immigration or other laws or otherwise do not want to be contacted by the government are not likely to accurately self-report their address information to DHS under an annual requirement. However, these nonimmigrants might be found using non-DHS information systems. Nonimmigrant aliens who comply with address reporting requirements or seek DHS benefits might be found using existing DHS systems or other information sources. Still other nonimmigrants who may not be aware of address reporting requirements or forget to file might also be found using other existing systems. ICE agents said that they consider the data found in existing public source database systems such as department of motor vehicle records, credit bureaus, court filings, and Internet search engines that compile address and other information to be more current and reliable than self-reported change of address data housed in NIIS.