You can make a copy of an existing guest card, edit the guest card details, and then when you save the guest card, the system saves it with a new number.
 . The Create Guest Card 
 page appears, which is the same as the copied 
 from guest card page except that:
. The Create Guest Card 
 page appears, which is the same as the copied 
 from guest card page except that:"NEW" appears in the Guest Card field instead of the copied from guest card number, and
information from the copied from guest card appears in the new guest card.
See Also
Global Policies for Guest Cards