When you say "topic", are you referring to Confluence Questions topics or do you just mean Confluence pages i.e. send a notification to the owner of the page if it hasn't been updated in a month?
If you are referring to outdated pages, have you looked into using something like https://marketplace.atlassian.com/plugins/com.midori.confluence.plugin.archiving/server/overview?
Do you use templates with Confluence? Take part in a remote 1-hr workshop. You'll receive USD $100 for your time! We're looking for people to participate in a remote 1-hr workshop...
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