---
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id: 34fc7897dacd8a72d8d06660f7c18610993fb136ef0b2a4401da2ac55806e3a3
title: Set Up Duplicate Detection
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/sfdo/264-0-0/ip_manage_duplicate_rules.md
canonical_url: https://help.salesforce.com/s/articleView?id=sfdo.ip_manage_duplicate_rules.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
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description: Create Matching Rules and Duplicate Rules, and run a duplicate job to see a list of duplicate records.
products:
  - Nonprofit
release: "264"
---
# Set Up Duplicate Detection

Create Matching Rules and Duplicate Rules, and run a duplicate job to see a list of duplicate records.

Before you can see a list of duplicate record sets on the Contact Merge page, you'll need to:

1. Create Matching Rules to tell Salesforce how to look for duplicates.
2. Create Duplicate Rules to tell Salesforce what to do when it finds duplicates as they're created, or
3. Run a Duplicate Job to find existing duplicates.