Navigation: Click the link "go to portal" from any Client's blue snapshot panel > click "Settings"
Here your client can:
register one or more credit/debit cards with you
delete any cards already registered
specify which card is the default card to be used for making payments
Your client can also authorise you to take due payments automatically from their card here (unless you have switched this option off in which case they can not opt out - see the information on Setting your Stripe Credentials and in particular the option Require Automatic Charges Allowed for more information
See Taking a Payment via Stripe for more help on this topic.
Click to enlarge
Stripe offers a simple and convenient way to enable your clients to pay their invoices with a credit and / or a debit card.
How to delete a credit card from the client account if it has expired or has been compromised.
With more than one card registered on the account, the client can specify a default card to be used.
How to prevent your clients from de-authorizing you from taking payments automatically from their credit card.