Reimbursement according to number of questionnaires

Question

We are going to collect data for multiple days from participants. They get €1 per day they fill in the questionnaire, if they don't fill it in, they get nothing. We ask for the e-mailaddress via the question: “Collect Email Addresses Separately”. We also ask with the question 'e-mail opt in' for their e-mail to send them the daily questionnaires.

Is there a way to connect their data to their e-mail for reimbursement? Because we need to know how much every participant should receive?

Thanks!

Answer 1

If using a mailing with a personalized link then each record in the dataset will have a SERIAL that identifies the respondent. In the default opt-in setting the addresses are stored pseuonymous, that means, you cannot see which address belongs to which SERIAL, but this information is still stored on the server.

The obvious option is to work with "personalized" address entries. However, note that personal data requires some additional efforts regarding GDPR. Also note, that pseudonymous data may also be considered as personal data. The same is true for bank connections.