At the moment email alerts for new issues of a subscription can only be managed by the patron themselves through the OPAC. And there only from the detail pages of the serials. It would be nice if it would be possible to delete (see bug 25848), but also to add these email notifications on behalf of patrons.
This would be really helpful for special libraries, where patrons don't typically log in to the OPAC, but do want to get notifications.
*** Bug 36692 has been marked as a duplicate of this bug. ***