--- title: Set Custom Rules to identify HubSpot duplicates description: When using the Koalify plugin, default rules help identify duplicates instantly, but you can also set custom rules. This is useful when duplicates are not found in the duplicate management tool or when a user changes their email address but remains the same person. image: https://koalify.io/hubfs/changed%20email%20address.jpg --- [Skip to content](https://koalify.io/blog/set-custom-rules-to-identify-hubspot-duplicates#main-content) [![rectangle\_long\_koala\_with\_name\_bold\_200\_125\_white](https://koalify.io/hubfs/rectangle_long_koala_with_name_bold_200_125_white.png)](https://koalify.io) - Products Show submenu for Products - [Deduplication](https://koalify.io) - [Email Validation](https://koalify.io/hubspot-email-validation) - Pricing Show submenu for Pricing - [Deduplication](https://koalify.io/pricing) - [Email Validation](https://koalify.io/hubspot-email-validation-pricing-koalify) - [Partners](https://koalify.io/partners) - [Blog](https://koalify.io/blog) - Knowledge base Show submenu for Knowledge base - [Deduplication](https://koalify.io/knowledge-base) - [Email Validation](https://koalify.io/email-validation-knowledge-base) - Products Show submenu for Products - [Deduplication](https://koalify.io) - [Email Validation](https://koalify.io/hubspot-email-validation) - Pricing Show submenu for Pricing - [Deduplication](https://koalify.io/pricing) - [Email Validation](https://koalify.io/hubspot-email-validation-pricing-koalify) - [Partners](https://koalify.io/partners) - [Blog](https://koalify.io/blog) - Knowledge base Show submenu for Knowledge base - [Deduplication](https://koalify.io/knowledge-base) - [Email Validation](https://koalify.io/email-validation-knowledge-base) ![menu-toggle](https://21645388.fs1.hubspotusercontent-na1.net/hubfs/21645388/menu-toggle.svg) ![menu-close](https://21645388.fs1.hubspotusercontent-na1.net/hubfs/21645388/menu-close.svg) [Get Started Free](https://api.koalify.io/hubspot/install?utm_source=koalify&utm_medium=website&utm_campaign=navigation) # Set Custom Rules to identify HubSpot duplicates [By \- Jonas,](https://koalify.io/blog/author/jonas) Nov 29, 2023 ![ Featured Image](https://koalify.io/hs-fs/hubfs/changed%20email%20address.jpg?width=609&height=410&name=changed%20email%20address.jpg) When you install the **[Koalify plugin](https://www.notion.so/)** a set of [default rules](https://koalify.io/hubspot-revenue-operations-blog/default-duplicate-rules-for-hubspot-contacts-companies) will help you [find duplicates in HubSpot.](https://koalify.io/blog/how-to-find-duplicates-in-hubspot) In addition to these rules you are also able to define custom rules. This helps you in the following situations: **When your contact changed his email address and HubSpot creates a new contact record** People can change their email addresses but that doesn’t change who they are. ![changed email address](https://koalify.io/hs-fs/hubfs/changed%20email%20address.jpg?width=400&height=269&name=changed%20email%20address.jpg)   **You are certain that a duplicate exist but it is nowhere to be found in the HubSpot duplicate management tool** The company registration number is exactly the same, it must be a duplicate no? ![IT must be a duplicate no](https://koalify.io/hs-fs/hubfs/IT%20must%20be%20a%20duplicate%20no.jpg?width=400&height=516&name=IT%20must%20be%20a%20duplicate%20no.jpg)   Sounds familiar? [**Get in touch!**](https://koalify.io/#contact) ###### Category - [HubSpot Data Quality](https://koalify.io/blog/tag/hubspot-data-quality) - [HubSpot Revenue Operations](https://koalify.io/blog/tag/hubspot-revenue-operations) - [HubSpot Integration Duplicates](https://koalify.io/blog/tag/hubspot-integration-duplicates) - [HubSpot Email Validation](https://koalify.io/blog/tag/hubspot-email-validation) - [HubSpot Associations](https://koalify.io/blog/tag/hubspot-associations) - [HubSpot Deduplication](https://koalify.io/blog/tag/hubspot-deduplication) ###### Popular Post - [HubSpot best practices for contacts that leave a company](https://koalify.io/blog/hubspot-best-practices-for-contacts-that-leave-a-company) - [How to Bulk Merge HubSpot Duplicates: Contacts, Companies, Deals and More](https://koalify.io/blog/how-to-bulk-merge-hubspot-duplicates-contacts-companies-more) - [How to Merge Companies in HubSpot (Safely, Manually or in Bulk)](https://koalify.io/blog/how-to-merge-companies-in-hubspot-manual-or-in-bulk) - [HubSpot Deduplication: How to Find, Manage, and Remove Duplicates in HubSpot](https://koalify.io/blog/hubspot-deduplication-the-ultimate-guide-to-zero-duplicates-in-hubspot) - [How to Merge Duplicate Contacts in HubSpot Without Losing Data](https://koalify.io/blog/how-to-merge-contacts-in-hubspot-manual-or-in-bulk) ### Similar Blogs ![How to handle duplicates in HubSpot when Chargebee is integrated](https://koalify.io/hs-fs/hubfs/Both%20Duplicate%20Companies%20Have%20a%20Chargebee%20Customer%20ID-1.png?width=352&name=Both%20Duplicate%20Companies%20Have%20a%20Chargebee%20Customer%20ID-1.png) #### [How to handle duplicates in HubSpot when Chargebee is integrated](https://koalify.io/blog/how-to-handle-duplicates-in-hubspot-when-chargebee-is-integrated) By [Jonas](https://koalify.io/blog/author/jonas) 25 March 2025 Duplicate records are always a challenge in any CRM, but when you’re working with integrated... [READ MORE](https://koalify.io/blog/how-to-handle-duplicates-in-hubspot-when-chargebee-is-integrated) ![Get an overview of all your HubSpot duplicates](https://koalify.io/hs-fs/hubfs/ME%20WHEN%20I%20DONT%20KNOW%20WHO%20OWNS%20THESE%20DUPLICATES%20AND%20WHERE%20THEY%20ARE%20COMING%20FROM.jpg?width=352&name=ME%20WHEN%20I%20DONT%20KNOW%20WHO%20OWNS%20THESE%20DUPLICATES%20AND%20WHERE%20THEY%20ARE%20COMING%20FROM.jpg) #### [Get an overview of all your HubSpot duplicates](https://koalify.io/blog/get-an-overview-of-your-hubspot-duplicates) By [Jonas](https://koalify.io/blog/author/jonas) 29 November 2023 When you install the **[Koalify plugin](https://www.notion.so/)** some Koalify properties will be created automatically. These... [READ MORE](https://koalify.io/blog/get-an-overview-of-your-hubspot-duplicates) ![When to Merge HubSpot Duplicates in Bulk versus Manually](https://koalify.io/hs-fs/hubfs/Merge%20Strict%20HubSpot%20duplicate%20Automatically%20With%20Koalify.png?width=352&name=Merge%20Strict%20HubSpot%20duplicate%20Automatically%20With%20Koalify.png) #### [When to Merge HubSpot Duplicates in Bulk versus Manually](https://koalify.io/blog/when-to-merge-hubspot-duplicates-in-bulk-versus-manually) By [Jonas](https://koalify.io/blog/author/jonas) 6 August 2024 Merging HubSpot duplicates can be a daunting task, especially for users with hundreds or even... [READ MORE](https://koalify.io/blog/when-to-merge-hubspot-duplicates-in-bulk-versus-manually) ## Koalify HubSpot deduplication and email validation - - [Review us on HubSpot](https://app-eu1.hubspot.com/l/marketplace/listing/koalify-io/write-review?eco_review_source=external-button) [![SOC 2 Logo](https://koalify.io/hs-fs/hubfs/SOC%202%20Logo.webp?width=70&height=70&name=SOC%202%20Logo.webp "SOC 2 Logo")](https://trust.koalify.io/) [![gdpr](https://koalify.io/hs-fs/hubfs/gdpr.png?width=70&height=70&name=gdpr.png "gdpr")](https://trust.koalify.io/) ## Company [Product](https://koalify.io) [Pricing](https://koalify.io/pricing-usd) [Knowledge Base](https://koalify.io/knowledge-base) [Blog](https://koalify.io/blog) [Partners](https://koalify.io/partners) ## Blog [HubSpot Deduplication](https://koalify.io/blog/hubspot-deduplication-the-ultimate-guide-to-zero-duplicates-in-hubspot) [Merge HubSpot Contacts](https://koalify.io/blog/how-to-merge-contacts-in-hubspot-manual-or-in-bulk) [Merge HubSpot Companies](https://koalify.io/blog/how-to-merge-companies-in-hubspot-manual-or-in-bulk) [Merge HubSpot Deals](https://koalify.io/blog/how-to-merge-deals-in-hubspot-manual-or-in-bulk) [Bulk Merge HubSpot](https://koalify.io/blog/how-to-bulk-merge-hubspot-duplicates-contacts-companies-more) ## Security [Trust Center](https://trust.koalify.io/) [Terms of Service](https://koalify.io/terms-of-service) [Privacy Policy](https://koalify.io/privacy-policy) [Data Processing Addendum](https://koalify.io/data-processing-addendum) [Security](https://koalify.io/security) © 2026 Koalify. 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