Set up your Green Dot User ID and password by: Creating your Green Dot User ID here. To create a User ID, you’ll need your: Card number Expiration date Date of birth ZIP code When asked, enter the last 4 digits of your Social Security number. Come up with a Green Dot User ID and choose a password to go with it. Then, fill in some personal information like your security question and a valid email address. Review the information and make sure it’s accurate. If you need to make any changes, simply select Edit to do so. If everything looks good, select Confirm to finish creating your Green Dot User ID and password.