Dear __________,
As an attorney, referrals are the best compliment I can receive! It’s satisfying to know my clients are happy with my services. Thank you so much for referring Mr. and Mrs. _____________ to my office. I’ve already met with this lovely couple, and have begun working on their case. The enclosed certificate for Starbucks is a small token of my appreciation for the referral. If you happen to need legal assistance in the future, please do not hesitate to contact me, it would be my pleasure to work with you again.
Best Regards,
(YOUR NAME HERE)