Hello from Australia,
I have found a family tree with my ancestors. Am I able to contact the TREE MEMBER?
Thanks for your question. You are able to send messages to most of the people who contribute to FamilySearch's Family Tree. This gives you details on how to use messages...
When looking at someone within FamilyTree, you will see the contributors name, for example in the "last changed" section...
Here you can click on the contributors name and then a pop up appears where you can select to send a message.
Hope this helps, and good luck with your research.