How to Batch Update and Deduplicate Contacts via CSV in Airtable

This guide explains how to batch upload and update contact lists in Airtable using a CSV file. By following these steps, you will merge new attendees into your CRM, properly update their conference history without overwriting past events, and prevent duplicate database records.

This workflow is ideal for marketing operations, CRM managers, and event coordinators who need to sync post-conference attendee lists with an existing database of contacts.

Prep the Initial CSV