Title: Validation
Last modified: September 1, 2016

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# Validation

 *  Resolved [murilozilli](https://wordpress.org/support/users/murilozilli/)
 * (@murilozilli)
 * [9 years, 10 months ago](https://wordpress.org/support/topic/validation-32/)
 * Is there a way I can validate if hidden field is let’s say, an email? So I can
   use it in “to” and “from” mail configurations?
 * [https://wordpress.org/plugins/contact-form-7-modules/](https://wordpress.org/plugins/contact-form-7-modules/)

Viewing 1 replies (of 1 total)

 *  Plugin Author [Zack Katz](https://wordpress.org/support/users/katzwebdesign/)
 * (@katzwebdesign)
 * [9 years, 4 months ago](https://wordpress.org/support/topic/validation-32/#post-8727623)
 * You can use
 *     ```
       add_filter( 'wpcf7_validate_hidden', 'wpcf7_hidden_validation_filter', 10, 2 );
       add_filter( 'wpcf7_validate_hidden*', 'wpcf7_hidden_validation_filter', 10, 2 );
       ```
   
    -  This reply was modified 9 years, 4 months ago by [Zack Katz](https://wordpress.org/support/users/katzwebdesign/).

Viewing 1 replies (of 1 total)

The topic ‘Validation’ is closed to new replies.

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## Tags

 * [email](https://wordpress.org/support/topic-tag/email/)
 * [from](https://wordpress.org/support/topic-tag/from/)
 * [to](https://wordpress.org/support/topic-tag/to/)
 * [validation](https://wordpress.org/support/topic-tag/validation/)

 * 1 reply
 * 2 participants
 * Last reply from: [Zack Katz](https://wordpress.org/support/users/katzwebdesign/)
 * Last activity: [9 years, 4 months ago](https://wordpress.org/support/topic/validation-32/#post-8727623)
 * Status: resolved