For each survey you can specify whether the participants are allowed to participate only once or several times. The settings can be changed at any time.

Please proceed as follows, to change the settings for the participation:

Select the desired survey in the Overview
Click on Settings
Under 'Participation' select the desired settings
Click Save settings

The change is active immediately.

Only one entry per computer is permitted
Select this option if only one-time participation is allowed. To prevent multiple participation, you can choose between cookie and IP block.

Cookie lock: With this option, we set a cookie in the participant's browser. The cookie only contains the survey ID with an anoymized participation session (32-digit hash). No personal data are stored or transmitted.
The cookie will only be stored in the browser when the option is activated.

IP address: With this option, we read the participants IP address, encrypt it into a non-reverse-encryptable 32-set hash, and store only the hash in the database. No readable IPs of participants are stored at any time.
Only when this option is activated, IP addresses are read and stored encrypted (hash).

The prevention of multiple participations is ensured by technical anchor points. For 100% security you can use access codes. This way each participation can clearly be identified and allowed a one-time participation across multiple devices.
Several participants per computer are possible
This setting is suitable for using a survey on tablet during a trade fair for example. After every participation the survey can be recalled on the same terminal/ device and provided to the next participant.