You can find your Alien Registration Number (A-Number) and Department of State (DOS) Case ID on your immigrant data summary, USCIS Immigrant Fee handout, or immigrant visa stamp. Your A-Number is the letter “A” followed by 8 or 9 digits (e.g., A012345678). Your DOS Case ID is 3 letters followed by 9 or 10 digits (e.g., XYZ0123456789). If you are a Diversity Visa immigrant, your DOS Case ID will have 4 digits followed by 2 letters and 5 more digits (e.g., 0000AB12345).
The immigrant data summary is usually attached to your visa package when you attend your appointment at a U.S. embassy or consulate. You can find your A-Number and DOS Case ID at the top of the immigrant data summary.
During your interview at a U.S. embassy or consulate, the DOS interviewing officer will provide you with a USCIS Immigrant Fee handout. This document instructs you on how to pay your USCIS immigrant fee and includes your A-Number and DOS Case ID in the upper right corner. Make a copy of the USCIS Immigrant Fee handout or write down your A-Number and DOS Case ID and store it in a safe place. If you did not receive an immigrant data summary or a USCIS Immigrant Fee handout with your visa package, please contact the U.S. Embassy or Consulate that issued your visa to request a copy.
You can also find your A-Number and DOS Case ID on the visa stamp (also known as the visa foil) in your passport. The A-Number is identified as the Registration Number on the visa stamp. If your A-Number has fewer than 9 digits, insert a zero after the “A” and before the first digit to make it 9 digits. For example, “A12345678” would become “A012345678”. The DOS Case ID is identified as the IV Case Number on your visa stamp. However, please note that the IV Case Number has two extra digits at the end, such as 01 or 02. When entering the IV Case Number as your DOS Case ID, do not include the last two digits. For instance, if your IV Case Number is “ABC1234567801”, you would enter your DOS Case ID as “ABC12345678” (excluding the “01”).
