---
schema_version: "1"
id: b2c9f7038090ed734d49c17d4fa6f6754c6b7c1a6a60a6c2895980c4bc255e86
title: Show Duplicate Records in Lightning Experience
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/sales/264-0-0/duplicates_existing_setup.md
canonical_url: https://help.salesforce.com/s/articleView?id=sales.duplicates_existing_setup.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 28d5e06b5a4f1eba4cad829e54f7599fa568f4ed5b94a57d66ab0351634c0b68
description: If a record duplicates other records, you can alert sales reps when they open the record in Lightning Experience. Activate duplicate rules and add alerts to page layouts.
products:
  - Sales
  - Sales Enablement
release: "264"
---
# Show Duplicate Records in Lightning Experience

If a record duplicates other records, you can alert sales reps when they open the record in Lightning Experience. Activate duplicate rules and add alerts to page layouts.

### Required Editions

<table class="slds-table slds-table_bordered slds-max-medium-table_stacked slds-m-bottom_small edition"><colgroup><col></colgroup><tbody><tr class=""><td class="slds-cell-wrap" style="vertical-align:top;">Available in: Lightning Experience</td></tr><tr class=""><td class="slds-cell-wrap" style="vertical-align:top;">Available in: <strong>Essentials</strong>, <strong>Professional</strong>, <strong>Enterprise</strong>, <strong>Performance</strong>, <strong>Unlimited</strong>, and <strong>Developer</strong> Editions</td></tr></tbody></table>

<table class="slds-table slds-table_bordered slds-max-medium-table_stacked slds-m-bottom_small permission">
        <colgroup>
          <col style="width:50%">
          <col style="width:50%">
        </colgroup>
        <thead class="slds-text-title_caps ">
          <tr class="">
            <th scope="colgroup" class="slds-cell-wrap" colspan="2" style="text-align:center;vertical-align:top;" id="d6164e80">User
              Permissions Needed</th>
          </tr>
        </thead>
        <tbody>
          <tr class="">
            <td data-label="User Permissions Needed" class="slds-cell-wrap" style="vertical-align:top;" headers="d6164e80 ">To view duplicate rules and matching rules:</td>

            <td class="slds-cell-wrap" style="vertical-align:top;" headers="d6164e80 ">View Setup and Configuration</td>

          </tr>
          <tr class="">
            <td data-label="User Permissions Needed" class="slds-cell-wrap" style="vertical-align:top;" headers="d6164e80 ">To create, edit, delete, activate, and deactivate duplicate rules
              and matching rules:</td>

            <td class="slds-cell-wrap" style="vertical-align:top;" headers="d6164e80 ">Customize Application</td>

          </tr>
        </tbody>
      </table>

In orgs created in Summer ’17 and later, standard duplicate rules and the Potential Duplicates component are set up and activated for business accounts, contacts, and leads. To use duplicate rules and the Potential Duplicates component for person accounts, first enable person accounts. Then activate person account matching rules and duplicate rules, and add the Potential Duplicates component to your person accounts layout.

You can alert sales reps to duplicates by showing a card on record home pages.

![On a record detail page, duplicate alert in a card: We found 1 potential duplicate of this account. (link) View Duplicates](https://sf-zdocs-cdn-prod.zoominsoftware.com/tdta-sales-data_quality-264-0-0-production-enus/abf88105-66d5-422e-983e-0592556338d7/data_quality/images/merge_ui.png)

Or you can show a temporary toast message. You can also display both types of alerts.

![On a record detail page, duplicate alert in a toast: It looks as if duplicates exist for this account. (link) View Duplicates](https://sf-zdocs-cdn-prod.zoominsoftware.com/tdta-sales-data_quality-264-0-0-production-enus/abf88105-66d5-422e-983e-0592556338d7/data_quality/images/merge_ui_toast.png)

1. In Setup, use the Quick Find box to find **Lightning App Builder**.
2. On accounts, contacts, or leads, add the Potential Duplicates component.
    
    ![Adding the Potential Duplicates component to a record home page](https://sf-zdocs-cdn-prod.zoominsoftware.com/tdta-sales-data_quality-264-0-0-production-enus/abf88105-66d5-422e-983e-0592556338d7/data_quality/images/merge_setup_ui.png)
3. Select how you want to alert sales reps to duplicates.
    
    ![Options for displaying duplicate alerts on record home pages](https://sf-zdocs-cdn-prod.zoominsoftware.com/tdta-sales-data_quality-264-0-0-production-enus/abf88105-66d5-422e-983e-0592556338d7/data_quality/images/merge_setup_ui_display_options.png)
    
    You can’t add the Potential Duplicates component to custom objects. However, you can create rules to handle custom-object records that duplicate an account, contact, or lead.

Reps who have permission to merge duplicates can choose up to three records on the same object to merge.

#### See Also

- [Stop Users from Creating Duplicate Records](https://help.salesforce.com/s/articleView?id=sales.duplicate_prevention.htm&release=264.0.0&type=5 "When sales reps are in the process of creating or editing a record, alert them that the data they’re entering duplicates an existing record. Or block sales reps from creating duplicate records altogether, whether or not they have access to the existing record. Activate duplicate rules and customize the settings.")
- [Guidelines for Merging Duplicate Accounts](https://help.salesforce.com/s/articleView?id=sales.account_merge_considerations.htm&type=5&language=en_US)
- [Considerations for Merging Duplicate Contacts](https://help.salesforce.com/s/articleView?id=sales.contacts_considerations_for_merging_duplicates.htm&type=5&language=en_US)
- [Things to Know About Merging Duplicate Leads](https://help.salesforce.com/s/articleView?id=sales.leads_merge_considerations.htm&type=5&language=en_US)
- [Enable Person Accounts](https://help.salesforce.com/s/articleView?id=sales.account_person_enable.htm&type=5&language=en_US)