I have a "term reference" field, in a form that uses an auto-complete widget. I want to limit user input to terms in the vocabulary only, and output a message when a user tries to enter a non existing term.
I found the Content taxonomy module. However this does not work with forms that contain a field collection or a field group.
There is also a contributed patch 1078878-DisableAutoCreation-D7-UTF-8.patch. But I was wondering whether there was a simpler/cleaner solution like a module or maybe I missed an already existing way of doing it with latest drupal and taxonomy versions.