Transaction Error: Unrecognized card type. Please try again with a Mastercard, Verve or VISA

What does 'Unrecognized card type. Please try again with a Mastercard, Verve or VISA' mean?

This means that the customer used a card that isn't acceptable on Paystack.

Currently, Paystack only supports transactions attempted with Verve, Mastercard and Visa cards.

What can I do about it?

The customer needs to retry the transaction with a Mastercard, Verve card or VISA card. Alternatively, the customer can try another payment channel on the checkout.