# Make a custom property unique

**URL:** <https://community.hubspot.com/t/make-a-custom-property-unique/622>\
**Category:** HubSpot Ideas\
**Tags:** object\
**Created:** [January 1, 2017, 9:41pm UTC](https://community.hubspot.com/t/make-a-custom-property-unique/622 "2017-01-01T21:41:28Z")\
**Posts on this page:** 1\
**Showing post:** 1

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**Author:** ![omri](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/omri/32/88643_2.png) [@omri](https://community.hubspot.com/u/omri)\
**Post date:** [January 1, 2017, 9:41pm UTC](https://community.hubspot.com/t/make-a-custom-property-unique/622/1 "2017-01-01T21:41:28Z")

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Make it possible to define a custom property as a unique field.

Meaning when a data is entered into that field, if it exists in another contact it will alert you of that (like it does for the email field)

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_[View the full topic](https://community.hubspot.com/t/make-a-custom-property-unique/622)._