Even after a survey has been dispatched, you can add participants to it. If you delete participants who have already completed the survey, their data doesn't appear in the results.
Step 1. Go to surveys
Click the menu icon on the top left of your screen and click Surveys in the main menu.
Step 2. Select dispatched
Select Dispatched in the Status drop-down.
Step 3. Choose edit
Point to the survey gear icon and choose Edit.
Step 4. Add or delete
Scroll to the Participants table. Point to the gear icon and choose Add Participants. To remove a participant, point to their gear icon and choose Delete.
Step 5. Select users
If you chose Add Participants, select a filter in the first drop-down. Select the users you want to add as participants in the survey and then click the close icon .