If two respondents share the same first or last names but use different email addresses, what will happen?

When two respondents have the same first or last name but different email addresses, both respondents will be able to authenticate. In Qualtrics, each respondent is identified uniquely by their email address rather than their name. This means that as long as the email addresses are distinct, the system will treat each respondent as a unique participant in the survey, allowing both to authenticate and provide their responses without any conflict.

Respondent authentication in survey systems, including Qualtrics, typically relies on unique identifiers like email addresses. This ensures that even if there are duplicates in the name, the unique email addresses serve as distinct identifiers for the respondents. As such, the presence of similar names does not create any issues in terms of authentication, and both respondents can engage with the survey independently.