If a Card on File is required to book, are clients still able to remove the card?

Clients are able to delete their card from their Clover profile after they make a booking. 

Clover sends an automated "You just added a card on file! Manage it here..." email to every customer that adds a card on file. We (Cojilio) do not send this email - from this email from Clover, clients are able to delete their card from their file through this email - this is Clovers security policy. 

If a client removes a card and cancels or no-shows their appointment last minute, you can disable their client account in the Cojilio Online Portal (Customers > Search for customer > "Click here" to disable) so they are unable to book a future appointment, or even login to your Online booking.

There is also the option to add the fee to their checkout cart as a "no-show skipped fee" and charge it the next time they come in.

Here is a Help Guide: How to Add a No-Show Fee for clients next visit (no Card on File)