My requirement was to get the feed back from the users who are not logged in as well , so initially i though of using record producers and Hi support mentioned below reply
To make a Catalog Item/Record Producer public, you also have to make both the item and the variables public. You can make the variables public by adding the columns "read roles", "write roles", and "create roles" to the "Variables" related list on the item. Then you can add the public roles to these columns and then the variables should be available to unauthenticated users.
I rejected the solution and i got this message
I apologize that the solution did not work. I have tested and verified that this functionality is actually not supported in Service Portal, but currently only in CMS. You may be able to set up a public CMS page and direct your unauthenticated users there via a link. You can follow this article if you would like to set up a public item in a CMS page: https://hi.service-now.com/kb_view.do?sysparm_article=KB0551300 There is no workaround currently available for this issue other than using a CMS page. Ordering catalog items in Service Portal requires a specific Angular transaction that is not currently supported for unauthenticated user. You can raise an enhancement request if you would like this functionality to be added to our product, which will be reviewed by our internal resources. Steps to create Enhancement Request can be found here >> Refer: https://hi.service-now.com/kb_view.do?sysparm_article=KB0547257
