The Startquestion platform enables its users to create the so-called double opt-in. The purpose of this function is to send a repeated message to the respondent asking for the confirmation of the e-mail address. The necessity to obtain such a confirmation has been imposed on companies collecting and processing personal data, in connection with the Regulation on the Protection of Personal Data, which comes into force on May 25, 2018.
This solution can be implemented in a simple way. However, the requirement is to first create a question for an e-mail address or send an invitation to the indicated address.
Then, after filling in the email, you should set the content of the message and call the so-called postfill, for example: [POSTFILL_noquestion].
How does this work in practice?
Let's assume that our survey contains 10 questions. To create a double opt-in, we add another, 11th single-choice question: Do you confirm your e-mail address?
We put only one answer in it: Yes
Then, in the edition of the questionnaire after the 10th question, the Go to: the next page option should be changed to End survey.
Then, after filling in the message sent to the respondent, it is enough to add [POSTFILL_10]. In this way, the defined content and a question with a link for confirmation will be sent to the e-mail address provided.
Of course, you can also apply filters to find out who completed the survey (with confirmation to the e-mail address), and who did not. How to create them can be read in this article.