Import Into HubSpot Without Duplicates

Someone on your team runs an import. The record count goes up, and everything looks fine until a contact gets the same email twice or a sales rep opens a record with missing history. Duplicates are easiest to prevent the moment data enters HubSpot. This guide covers the full process, from choosing the right unique identifier to preparing your file, configuring import settings, verifying the results, and closing the entry points that allow duplicates to return.

What You’ll Find Inside

Run your next import knowing exactly which records it will update and which it will create. The guide covers the unique identifier each HubSpot object matches on, a file prep sequence with the formulas to run it, the import settings that decide how much damage a bad file can do, a verification pass built around the results screen and error file, a merge order for the duplicates you already have, and the entry points beyond imports that keep producing more.

Who This Is For

Marketing, sales ops, and RevOps teams who own imports in HubSpot
Anyone loading event lists, purchased lists, or enrichment exports into the CRM
Teams migrating from another CRM or consolidating several systems into HubSpot
Admins who inherited a portal with a duplicate count nobody can explain
Non-technical users, since every step runs in the HubSpot interface and a spreadsheet