Check the app’s Trash, Recently Deleted, or Archive folder
Use the app’s search feature to look for the note title, keywords, or tags
Restore from a cloud backup or sync service
Check other devices signed into the same account
Review local device backups
Reopen the app and refresh or resync the account
Verify the correct account is selected
Look for notes in shared folders or team spaces
Check email, attachments, or exported files for saved copies
Use file recovery tools if the notes were stored locally
Contact the app’s support team
Enable automatic backups and sync to prevent future loss