I agree Carol, the best thing is to drip feed - give them a tiny bit and ask for clarification of something in return. That way you soon realise if they are genuine or just trying to get information without giving.
However in Fleur's example, it does seem odd - why would anyone be that worried about seeing divorce information, rather than just take her word for it? If someone told me about a divorce, I wouldn't then expect them to produce the documents to prove it, I would get them myself if I was that bothered.
Hello!
The person in question was aware before speaking to me that our mutual relative has been married three times and divorced three times. The person had a rough idea of our relative's divorce dates. When they asked me if the dates seem correct I responded in the affirmative and they then said that they won't show me their tree until I get the decrees and the precise dates. They said to me that they need these dates for their tree and that they don't want to show it to me until they have them as their tree is not complete until they do.
They also said that they have contacted said relative in regards to their divorces and that our relative ignored their letter and a few weeks later hung (hanged?) up on their unwelcome telephone call.
This doesn't surprise me as apparently they started the telephone call not with an introduction, but with, "hi, I'm doing a family tree - can you please confirm that names of your three husbands and the dates when you divorced them?".
Thank you for all the good advice.
Fleur xxxx