The best one I ever heard was for an agency that serves the deaf as readers and interpreters. The volunteers didn't usually interact with the clients, since the reading was done over the radio. At the recognition event, each volunteer had a letter at his/her plate that was dictated by a listener of the show for which the volunteer read. The letter spoke about the reader and how his/her tone of voice made the listener feel and how it helped the listener to hear the piece of the newspaper that was read (or whatever). The letters were typed on special paper and framed nicely. The coordination of it was work, of course, but the recognition didn't take any time away from the event, which already had a full agenda. The volunteers reported it was the most impactful recognition they had ever received. They heard directly from their listeners and learned how important they were - personally.