How do I make the questionnaire really anonymous?

Anonymise highlight

By default, Qualtrics collects internet information such as the IP address of the respondent’s computer. Such information is used by some Qualtrics options for example allowing people to return and finish an interrupted questionnaire or to stop multiple responses from the same computer. Although this is not usually a real risk to anonymity there are times when vulnerable respondents might want reassurance of a higher level of anonymity. ¬†You can achieve this using the Survey Options by selecting Anonymise Response.