refund virtual credit card

I am needing to refund guests partially 50% - took full payment for booking as per my non-refundable policy.    

Several guests paid by virtual card which booking.com issues.    If I partially refund the virtual card how does the guest receive their refund?  







That's not really something we need to be thinking about, as that is between BdC and the Guest.

You only have to authoirse the refund, that literally it.

No further action after that.



Kind Regards.