Burcu, did you ever submit this survey from ANY ticket before? I found this info :"
No for per ticket closed. One of meanings Stricter rule - Once the user has submitted the survey, no further survey invitations will be sent from any incidents closed. As well, even if the user clicks on the other invitations he received, he will NOT be able to complete the survey again. The user is limited to one response for that survey
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this means once you have the strict rule set, one user can submit this survey ONLY once from any ticket and this rule is not per ticket. That is, if you submitted this survey before from another closed ticket, you won't be able to do it again on a newly closed ticket, even somehow you receive
the link. Hope this info helps. Thanks _Chi