Yes, we have an NDA in practice that maintains the confidentiality of a particular contest run by clients.
If a client wants to keep their contest private or protected from search engines, all the participants in that contest need to give their consent to an NDA agreement. This agreement takes place between the client and participants who want to access the contest details (private/protected contest).
The NDA terms include participants refraining from disclosing the contest details to other people.
Designhill’s private/protected contests include a pre-created NDA agreement. You also get the flexibility to upload your version of NDA.
NOTE: We do not assure the legitimacy of an NDA, though.