The easiest way to make Survey Monkey anonymous is to set the survey to “anonymous” via the Properties tab when creating the survey. This will disguise the respondents IP address, delete any email addresses used to submit the answers, and identify them by a randomly assigned survey ID number.
Additionally, you can require respondents to create usernames and passwords and prevent the survey summary from identifying the respondents. Finally, ensure that all response data is stored securely, with only authorized personnel having access.