ISO 27701 is a privacy extension to the widely recognized ISO 27001 standard that provides guidelines for implementing and maintaining a privacy information management system (PIMS). Here are some case studies of successful implementations of ISO 27701 certification: Microsoft: Microsoft achieved ISO 27701 certification for their PIMS in 2020, making them the first major cloud service provider to do so. This certification helps to provide assurance to customers that their data is being managed in accordance with strict privacy standards. Hitachi Systems Security: Hitachi Systems Security is a global provider of information security services. They achieved ISO 27701 certification in 2019, which helped them to improve their privacy management practices and provide a higher level of assurance to their customers. Intertek: Intertek is a multinational testing, inspection, and certification company. They achieved ISO 27701 certification in 2020, which helped them to enhance their privacy management practices and demonstrate their commitment to privacy to their customers.