Activate Cash App Card Enter in where you would like to have your Cash Card mailed to. Tap the green "Next" button to confirm. On the following page, confirm your first and last name, which will be printed on your card. Tap "Next." Enter your date of birth. Note, that you have to be at least 18 to request a Cash Card. Tap "Next." Lastly, enter the last four digits of your social security number. Tap "Next."