Many customers may not be willing to take part in referral marketing program simply because they don’t know how the personal details collected will be used by the company. It is better to build rapport with the company by asking them to rate your product or subscribe to newsletters. Before announcing the referral marketing program, privacy clauses and confidentiality clauses should be communicated to them so that they feel confident about referring people to you.
According to a paper by Duncan Watts and colleagues entitled: "Everyone's an influencer", the most common risk in viral marketing is that of the influencer not passing on the message, which can lead to the failure of the viral marketing campaign. A second risk is that the influencer modifies the content of the message. A third risk is that influencers pass on the wrong message. This can result from a misunderstanding or as a deliberate move.