Users with Administrator privileges can modify their default payment method of the account, provided that the new payment method is valid. This a done by logging into your DocEndorse account, then selecting the "Settings" page, then clicking "General", and selecting the "Admin" tab. You scroll down to "Subscription Settings". From subscription settings you clicking on the card displayed. A prompt will open up that will allow you to enter a new card number and an expiry date. You then save and exit the prompt and your payment method will be updated.