Couchbase Lite does not delete these entries automatically, however you can use the Purge() mechanism to achieve the result of deleting them out of the local database. Just be careful because then you enter a slippery slope of the local database thinking you don’t have the document, and purging it doesn’t prevent it from being pulled back down again in the future if it is modified again. Furthermore, the tombstone entries have no body in them and after a compaction (you can achieve this by calling Compact()) there will be no data left except for the document ID and revision ID so unless the document ID is sensitive then you might not have to worry.