Refer a Friend Refer a friend and get up to $500 in free marketing! How does it work? Refer your friend, colleague, or Facebook connection to Identity Dental Marketing. Once they begin working with us, naming you as their referral source, we will thank you with a month of free internet marketing, up to $500 off your next payment. There are no limits, so spread the word! * Note: free marketing offer applies only for existing clients of Identity Dental Marketing.