You can change the payment method on a client’s membership on their membership details.
Use the “...” button on the Membership Details window to select Change Payment Method
You can change the payments to be Automatic / Manual .
You can also add / change the credit card on file.
To request a new credit card from the client, select Request credit card from client via email.
To learn more about the different payment options available, please read the relevant section in: Start a New Membership for a Client