If in doubt, take professional advice. Rocket Lawyer provides information and software only. Rocket Lawyer is not a "lawyer referral service" and does not provide legal advice or participate in any legal representation. Deeds of confidentiality and fidelity (also referred to as deeds of confidentiality or confidentiality deeds) are commonly used in Australia. These documents generally serve the same purpose as and contain provisions similar to non-disclosure agreements (NDAs) used elsewhere. Use of non-disclosure agreements are on the rise in India and is governed by the Indian Contract Act 1872. Use of an NDA is crucial in many circumstances, such as to tie in employees who are developing patentable technology if the employer intends to apply for a patent.