# Duplicate Validation in Form Input

**URL:** <https://community.glideapps.com/t/duplicate-validation-in-form-input/1593>\
**Category:** Feature Requests\
**Created:** [November 1, 2019, 1:52pm UTC](https://community.glideapps.com/t/duplicate-validation-in-form-input/1593 "2019-11-01T13:52:07Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Jaskaran\_Sachdeva](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/jaskaran_sachdeva/32/1254_2.png) [@Jaskaran\_Sachdeva](https://community.glideapps.com/u/Jaskaran_Sachdeva)\
**Post date:** [November 1, 2019, 1:52pm UTC](https://community.glideapps.com/t/duplicate-validation-in-form-input/1593/1 "2019-11-01T13:52:07Z")

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Is there a way to check if a form input (eg. Phone No) already exists and shows an error message to the user and not let them submit the form?

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**Author:** ![Jeff\_Hager](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/jeff_hager/32/43_2.png) [@Jeff\_Hager](https://community.glideapps.com/u/Jeff_Hager)\
**Post date:** [November 1, 2019, 3:25pm UTC](https://community.glideapps.com/t/duplicate-validation-in-form-input/1593/2 "2019-11-01T15:25:43Z")

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They’re isn’t any validation other than marking a field as required.

I suppose it would be nice to have a unique value validation check, or maybe a new data column of a “Key” type, where you could specify which columns combined are part of a unique key for a row, and then perform a validation check if the user ever attempts to add or edit a records where the values match an existing record in the sheet