# Difficulty detecting duplicate Contacts

**URL:** <https://community.hubspot.com/t/difficulty-detecting-duplicate-contacts/126587>\
**Category:** APIs & Integrations\
**Tags:** contacts\
**Created:** [February 21, 2025, 3:31pm UTC](https://community.hubspot.com/t/difficulty-detecting-duplicate-contacts/126587 "2025-02-21T15:31:26Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![MichaelMa](https://avatars.discourse-cdn.com/v4/letter/m/b5ac83/32.png) [@MichaelMa](https://community.hubspot.com/u/MichaelMa)\
**Post date:** [February 24, 2025, 2:18pm UTC](https://community.hubspot.com/t/difficulty-detecting-duplicate-contacts/126587/9 "2025-02-24T14:18:58Z")

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They have an example on their help document on the Search API under “Filter search results” on using the IN operator on enumerated fields (search for enumeration\_property on the page and you’ll see the code).

> **[Accounts Dashboard | HubSpot](https://app.hubspot.com/myaccounts?next=developerdocs&redirect=%2Fguides%2Fapi%2Fcrm%2Fsearch)**

Once you know that, it’s just verifying that hs\_additional\_emails is also an enumerated field.

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_[View the full topic](https://community.hubspot.com/t/difficulty-detecting-duplicate-contacts/126587)._