You were invited to HomeExchange and you'd like to highlight this member as the person who invited you to join us, to recognize their valuable contribution to our community?
To do so, go to "My profile" (under the "Social and Network" section) and add their referral code:
Related article: How do I invite friends and see if they joined?
P.S. You can't finalize an exchange with someone who invited you to join our community, or with the person who referred you.