What Happens if the Respondent Declines the Survey?
 If a respondent clicks on the DECLINE option, the respondent will decline from 
just that survey, this is then reflected in the application when navigating to 
My Surveys --> Declined Responses:
    
    
    The survey designer has the option to 
UNDECLINE a respondent by navigating to the 
Distribution --> Respondents browse. Select a respondent then click on the Undecline button:    
    
     
    What Happens if the Respondent Chooses to Block Emails?
  If a respondent clicks on the BLOCK option, you 
can't/won't be allowed to send surveys to that respondent again 
AND you cannot affect the block at all.
    The person who has blocked themself however does have the ability to 
UNBLOCK themself. A respondent can use the following link to 
UNBLOCK themself on the WSC website: 
Unblock/block emails