John Jantsch offers some good suggestions for how to develop the case study as testimonial. In Involve Your Clients In Their Story, he recommends these four questions as the basis of a one page case study:

1. What solution were you seeking when you hired us?
2. What did/do we provide that you value the most?
3. What has been the result of working with us?
4. What would you tell others who are considering hiring us?

If your association is looking to harness the power of the member testimonial, John’s questions might be slightly tweaked like so:

1. What challenge or problem were you seeking a solution for?
2. What did/do we provide that you value the most?
3. What has been the result of your membership with us?
4. What would you tell others who are considering joining us?

Why do your members continue to renew? What’s the lasting value? If your members are like most, they want their association to help them solve a problem.

Now capture that data in a powerful testimonial. Gather ten or twenty more. Let the member tell their story and give them the tools to share their story with other potential members. It’s word of mouth marketing like this that builds ever-increasing and long-lasting connections. As John points out, it creates relationships where association and member are now responsible for each other’s success:

I believe fully that doing business long term means
creating relationships – in any healthy relationship both parties have
a responsibility to help each other get what they want. If you are not
training your clients to expect to help you build your business, as you
help them get what they want, you are setting yourself up for a short
term relationship.