By default, the card used in paying for the subscription plan upon registering is the main card used for charging. You can modify this setting by entering new card detail and make it a default one after saving card information.
Step 1: In your OnePassport Dashboard, click Account Settings.
Step 2: Click Payment & Subscription from the top bar menu to show Credit/Debit Cards tab under it.
Press the Credit/Debit Cards. Look for the plus sign under Cards and click it.
Step 3: Enter card details and click Save.