ABSTRACT
Kay sent out over 50 invitations for her fortieth birthday party well in advance as she wanted to know how many would be able to come in good time. On the bottom of the invitations she put RSVP (Please reply), but two weeks before the party she had still not heard from several people. Consequently, she had to spend some hours over a couple of nights ringing people up to find whether they were planning to come. How much time it would have saved – not to mention the worry of wondering if people were going to turn up – if they had bothered to reply.
