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While the law does offer some level of protection against third parties divulging sensitive information given in confidence, it is generally seen as good practice to formalise the confidentiality of discussions using either a non-disclosure agreement (NDA) or a mutual non-disclosure agreement (also known as a confidentiality agreement). A mutual non-disclosure agreement works in the same way as an NDA, but the confidentiality applies to both parties.
An NDA can deal with the following issues: