Debbie, you could try this as an Idea, if you know his person try leaving your Wikitree open, and invite them over, and show them throught the processes of what goes on in and aroung the program, and explain to them the different levels off securities, that why the person in question might have a better understanding of the perpose of the Wikitree experience, and might just relenqishes there family history, I had the same problem with one of my relatives when I suggested that I was going to publish my tree, they thought I was going to but it on a very well known social web site, and that details like national security numbers, and very personal details of there family was going to be seen by all, I had to tell them the only details anyone could see is Names, and dates, Simples. And as a result they understand now! hope this helps.