If you are already a beneficiary of the Deferred Action for Childhood Arrivals (DACA) program, then you have most likely been issued an A-number. If you’re filing to renew your DACA status, you will need the Alien Registration Number to fill out item 6 of Form I-821D, known as Consideration of Deferred Action for Childhood Arrivals. You should be able to find your Alien Registration Number on the approval notice you received for the initial application. If you’re filing Form I-821D for the first time, you may not have an A-number. If you’re unsure, you can look at any paperwork you’ve received from USCIS. The A-number appears on most correspondence sent by this agency.