I have been asked to design a referral feature on a site. The site is a non-profit that contains services for parents around children with learning disabilities. The referral aspect is for parents to recommend this site to other parents they may know that would be interested.
Adopting this behavior is something completely new for them and I was wondering if there are any best practices around this enhancement?
For example, should a user have a gmail window open with a pre-populated message, or should they just be able to input email addresses straight into the site?