Iv case number, also known as Immigration Visa case number, is a unique identifier assigned to every immigration case processed by the United States Department of State (DOS). This number is crucial in tracking and managing the progress of an individual's immigration application. The IV case number consists of three letters followed by ten digits, for example, AAA0123456789. The letters represent the U.S. embassy or consulate where the case is being processed, while the ten digits signify the specific case number assigned to the applicant. There are different types of IV case numbers, depending on the immigration process and category: 1. Immediate Relative (IR) IV Case Number: This type of case number is assigned to individuals who are immediate relatives of U.S. citizens, including spouses, parents, and unmarried children under the age of 21. The IR case number begins with the letters "ABC" followed by the ten-digit number. 2. Family Preference (F) IV Case Number: For individuals who are eligible for family-sponsored immigration preferences, such as unmarried adult children of U.S. citizens or siblings of U.S. citizens, the F IV case number is assigned. It typically starts with the letters "DEF" followed by the ten-digit number. 3. Diversity Visa (DV) IV Case Number: This type of case number is specific to the Diversity Visa Program, also known as the Green Card Lottery. DV case numbers start with the letters "GHI" followed by the ten-digit number. Those selected through the lottery receive a DV case number, which allows them to proceed with their visa application. 4. Employment-Based (EX) IV Case Number: Individuals seeking employment-based immigration are assigned an EX case number. These individuals are usually sponsored by U.S. employers and fall under various employment visa categories such as EB-1, EB-2, EB-3, etc. The EX case number starts with the letters "JAL" followed by the ten-digit number. 5. Special Immigrant (SI) IV Case Number: This type of IV case number applies to individuals who qualify for special immigrant status, such as religious workers, Iraqi or Afghan translators, or veterans of the U.S. Armed Forces. The SI case number begins with the letters "NO" followed by the ten-digit number. It is important to note that these prefixes (ABC, DEF, GHI, JAL, and NO) used in IV case numbers are just examples and may vary depending on the specific consulate or embassy handling the case. The ten-digit number after the letters is unique to each individual's case, allowing for easy tracking and identification within the DOS system. Overall, the IV case number plays a significant role in the immigration process, helping both applicants and immigration authorities to efficiently manage and monitor the progress of visa applications.