If you need to ensure messages are preserved for evidence or archival:
Third-party client mods like MessageLoggerV3 save local copies of all incoming chat. recover-deleted-messages-on-discord
Request your Discord data package every few months to maintain a local archive of your existing history. Requesting a Copy of your Data - Discord Support If you need to ensure messages are preserved
Bots like Dyno or MEE6 can be configured to log message events to a private moderator channel. setup a dedicated logging channel immediately.
While server admins can see who deleted a message in the Audit Log, the actual content of the deleted message is not recorded.
Sites claiming to "retrieve deleted history" often use these scripts to steal accounts .
For server owners, setup a dedicated logging channel immediately.