BIKETOWN requires all riders to keep an active credit card on file in case any extra time charges are incurred – for example, if you keep a bike out for longer than the time allowed in your plan. You can keep your payment information updated either through the website or the app.
From the website:
Log into your BIKETOWN account and navigate to your user account page. Then, select “Memberships” on the left side menu, click the green edit pencil, and add your new credit card information.
From the app:
Navigate to the menu in the upper right corner, select “Memberships” then “Add new credit card”.