A client has requested to view a Workspace board??

[Nadia Hall]

Can anyone tell me why this might have happened? I've invited dozens of clients to their own Trello boards and this has never happened, someone has requested to see a board that should only be visible to my Workspace. I'm freaking out that they can also see my client enquiry board, recruiting board and other team boards??? There is a lot of sensitive info in my workspace and I don't understand how they're seeing this. 

[Caity]

Is it possible that there's a link to the template somewhere in the board you added the to? For example, if one of the cards on the template links to another card, when it was copied, that link would still have pointed to the original card on the template board. If someone clicked on that, they wouldn't be able to see the board but could request to join.

[Josh_Unito]

Is it possible you accidentally changed the visibility settings on your template? 

If the person requesting access is a member of your Trello Workspace, they might be seeing the board listed in the Workspace, even if they don't have direct access.