Here's a few common error messages from Stripe.
- Card declined: Your card's expiration date is incomplete
- Card declined: Your card's security code is incomplete
- Card declined: your Postal code is incomplete
This means you haven't completely filled out the information for the credit card. Make sure these fields have been completed and verified with the customer.
If you don't want to verify CVC/CVV or zip codes - see this help article about disabling verification in stripe.