Where can I see my referral credit? Head to your welcome page. Your credit will be listed above Manage My Box. The total amount displayed will include all unused Dia&Co credit you’ve ever received, including gift cards and store credit. Related articles When do I receive my $30 referral credit? How can I earn $30 for referring a friend? How much referral credit can I earn? I wear a size 12—is this service for me? Can I transfer my store credit?