Use the MacSonik vCard Duplicate Remover to remove duplicate contacts from vCard files. With no data loss, it can instantly remove duplicate contacts from vCard files. With the help of this program, users can save contacts based on vCard file name as well as first name, last name, email address, and mobile number. There are also other naming options available. There is a free trial version of this software available to evaluate its functionality, and it is completely safe.