# Avoid duplicate usernames

**URL:** <https://community.glideapps.com/t/avoid-duplicate-usernames/69756>\
**Category:** Ask for Help\
**Created:** [January 19, 2024, 2:53pm UTC](https://community.glideapps.com/t/avoid-duplicate-usernames/69756 "2024-01-19T14:53:19Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Simo](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/simo/32/62132_2.png) [@Simo](https://community.glideapps.com/u/Simo)\
**Post date:** [January 19, 2024, 2:53pm UTC](https://community.glideapps.com/t/avoid-duplicate-usernames/69756/1 "2024-01-19T14:53:19Z")

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Hi everyone,

Is it possible to avoid duplicate usernames in a Google Sheet, and warn that a similar username already exists?  
Which control should I use for this purpose?

I thank

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<div class="post-metadata">

**Author:** ![kyleheney](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/kyleheney/32/41173_2.png) [@kyleheney](https://community.glideapps.com/u/kyleheney)\
**Post date:** [January 19, 2024, 3:56pm UTC](https://community.glideapps.com/t/avoid-duplicate-usernames/69756/2 "2024-01-19T15:56:10Z")

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Check out this post: [How do I create a custom form?](https://community.glideapps.com/t/how-do-i-create-a-custom-form/25014)