# Tracking Pixel: what field names to use

**URL:** <https://forum.mautic.org/t/tracking-pixel-what-field-names-to-use/3572>\
**Category:** Product Support\
**Created:** [April 22, 2016, 4:21am UTC](https://forum.mautic.org/t/tracking-pixel-what-field-names-to-use/3572 "2016-04-22T04:21:51Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![pdowd](https://avatars.discourse-cdn.com/v4/letter/p/4da419/32.png) [@pdowd](https://forum.mautic.org/u/pdowd)\
**Post date:** [April 22, 2016, 4:21am UTC](https://forum.mautic.org/t/tracking-pixel-what-field-names-to-use/3572/1 "2016-04-22T04:21:51Z")

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Hi,  
  
  
  
I’m trying to update lead fields using the tracking pixel. It is passing the value to Mautic as they show in the anonymous visitors history, but they don’t populate the leads fields. I am passing firstname and email to Mautic.  
  
  
  
I’m using javascript via google tag manager.

Code:

  
They appear in Mautic as:

Quote:

Time on page: Unknown  
Referrer: www.example.url  
Page URL: www.example.url  
email: email@example.com  
firstname: Mautic Test

  
So i guess there are two questions:  
  
1. Can I populate the lead fields using the tracking pixel? If so then are there extra things I need to add prior to calling the fieldss?  
2. What are the field names I should be using?  
  
Thanks  
  
Paul

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<div class="post-metadata">

**Author:** ![pdowd](https://avatars.discourse-cdn.com/v4/letter/p/4da419/32.png) [@pdowd](https://forum.mautic.org/u/pdowd)\
**Post date:** [April 22, 2016, 4:21am UTC](https://forum.mautic.org/t/tracking-pixel-what-field-names-to-use/3572/2 "2016-04-22T04:21:51Z")

</div>

Hi,

I’m trying to update lead fields using the tracking pixel. It is passing the value to Mautic as they show in the anonymous visitors history, but they don’t populate the leads fields. I am passing firstname and email to Mautic.

I’m using javascript via google tag manager.

[code]

[/code]

They appear in Mautic as:

[quote]Time on page: Unknown  
Referrer: www.example.url  
Page URL: www.example.url  
email: [email@example.com](mailto:email@example.com)  
firstname: Mautic Test[/quote]

So i guess there are two questions:

1. Can I populate the lead fields using the tracking pixel? If so then are there extra things I need to add prior to calling the fieldss?
2. What are the field names I should be using?

Thanks

Paul

---

<div class="post-metadata">

**Author:** ![pdowd](https://avatars.discourse-cdn.com/v4/letter/p/4da419/32.png) [@pdowd](https://forum.mautic.org/u/pdowd)\
**Post date:** [May 6, 2016, 3:53am UTC](https://forum.mautic.org/t/tracking-pixel-what-field-names-to-use/3572/3 "2016-05-06T03:53:23Z")

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Thanks. It seems to be working fine now with just the change to publicly updateable.