REDCap:How to - Ensure anonymity and have prizes
You want to give a prize as an incentive for your survey?
Great, then take a moment to analyze your data privacy requirements.
Case 1: Pseudo-anonymization is sufficent
In case that pseudo-anonymization is sufficient for your survey, you can create two instruments in one REDCap project, one containing the survey, followed by an instrument to collect the contact data for the prizes. Be aware that the answers of both instruments will belong to the same record_id.
If you first collect informed consent as described in REDCap:How_to_-_Survey_with_informed_consent, you probably don't want to invite people to the prices if they are not participating in the survey. In that case, you CANNOT link to instruments together, because the stop action will take you to the next survey, and not to the end. For this situation, we recommend asking for the contact details inside of the survey instrument and make sure that you set these fields as an identifying field:
And that you carefully choose the access rights of your staff for this project and work with the anonymized dataset.
You can always use the approach of case 2.