Duplicate contacts creep in quietly — the same person gets entered twice under a different email, or an import creates a copy of an existing record. Every duplicate means a split history: half the correspondence in one record, half in another.

How to prevent new duplicates

1. The system checks for similarity (email, phone, name) before creating a new contact
2. When importing large lists, duplicates get flagged for review instead of created automatically

How to clean up existing ones

A periodic duplicate review with the option to merge records, preserving both histories in one — better than deleting one and losing its data.

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