The self-prophecy phenomenon served as the basis for a simple, inexpensive technique aimed at increasing donations in a telephone fundraising drive. Self-prophecy is predicated on two psychological effects. First, asking people to make predictions about normatively influenced behaviours results in biased responses—people respond as they think they should. Secondly, when later asked to perform those same behaviours, people tend to be consistent with their predictions. In an experiment, asking people to make a prediction increased the success rate from 30.4 per cent to 49 per cent, relative to a control group. Although it may be limited to occasional use, the self-prophecy technique appears a simple and economical tool for increasing donations. Copyright © 2000 Henry Stewart Publications.