Just an FYI, if you are using Ancestry Library Edition rather than a paid Ancestry.com account, I don't think it's possible to contact a tree owner; you won't have access to Ancestry's messaging system at all, and there is no link available for contacting tree owners (in fact, I don't think you can even see who the owner of a public tree is through Ancestry Library Edition these days).

I seem to remember managing this somehow from Ancestry Library Edition in the days before they switched to ProQuest - although there was no inbox where you could receive a reply, I think you could at least send a tree owner a message with your direct contact information. That workaround doesn't exist any more, though.

Adam Turner

You can only contact the owner if you too have a membership to Ancestry. If you are using a library version, you need to find someone to send the message for you.

Roberta Jaffer
Massachusetts

Since apparently you cannot contact a person through the Ancestry Library Edition, you might try finding that person online.  I use freepeoplesearch with reasonable results. Often there is a phone number and address and sometimes even an email address. Here's an article on similar services.  https://www.lifewire.com/free-people-search-sites-the-best-on-the-web-3482274
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Barbara Sloan
Conway, SC

I have also been successful contacting people via Facebook. Also check Familysearch if they posted a public tree. Whitepages.com also has information.
Michele Farkas
Boynton Beach, FL
researching Farkas, Rosenfeld, Izsak, Stauber, Hershtik, Teszler, Malek (Hungary, Transylvania, Romania)

I don't have an Ancestry.com membership, but did have my DNA done through them. I have been able to make the connection via the Library posting, and the DNA match of the tree in question. 

I was then able to contact the member through the DNA match. Usually with a friendly note saying. "I see you've added my entire family to your tree, let's see if we can find a connection". As these are generally active members, I have gotten responses each time. As opposed to the much closer DNA matches who ignore the messages. 

One of the two times this happened, I was actually able to make a legitimate connection. The other times, it was an endogamous situation, who was putting up trees with similar names and hoping to connect later.  

Scott P. Dann
Beachwood, OH