Dear @Lisa D 
 It is unfortunately not possible to see the full card number back in Mews and this is so following the new regulations in Europe. What you can always try is, if this reservation has come in via an Ota, to look on your dashboard there to see if you can still get the full card number that way. Hopefully this answers your question. If you want to debit the customer on this card you can do that from Mews right away under billing with charge and close.

Robin