How do I activate my Aspen card? / How can I start using my Aspen card? Before you can use your card you must activate it by following these steps: Telephone 0800 246 1327 When prompted, select the appropriate language When prompted, choose Option 1: PIN reveal When prompted, key in the 16-digit number found on the front of your Aspen card When prompted, key in your date of birth in the format DDMMYY (for example, if your date of birth is 5 February 1975, enter 050275). Manage Cookie Preferences