DanB, sorry to hear about blisters. If you can't part with the shoes, you can always buy a new pair and display the old pair as an art installation on your wall? // I guess you are right about adding this to their CV. I suppose I can list the volunteers' names on the exhibition website as contributors, so they can put the link on their CV... Just an idea. //After your replies here, I sent the email to the person who will advertise the voluntary work, and I didn't mention payment, only lunch and invite to the Private View.