Registration using ODK

Hi @Mistangor,

Welcome to the forum! Please introduce yourself here! .

At the moments odk collect does not support that kind of functionality. All data lives on the device until they get submitted. And after that, they is no way at the moment to real time fetch the information from the server.

A workaround for that, since you issue a QR code to participant is easy to distribute those codes to participants which will ensure no duplicates. Duplicate check is done once all the data is downloaded, during data processing.