Title: Undefined array key “is_vat_valid”
Last modified: July 15, 2026

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# Undefined array key “is_vat_valid”

 *  [kuebk](https://wordpress.org/support/users/kuebk/)
 * (@kuebk)
 * [3 weeks, 6 days ago](https://wordpress.org/support/topic/undefined-array-key-is_vat_valid/)
 * Hi,
 * After updating plugin to the latest version, I noticed following PHP warnings:
 * `Undefined array key "is_vat_valid" in /home/xxx/domains/yyy/public_html/wp-content/
   plugins/eu-vat-for-woocommerce/includes/blocks/class-wpfactory-wc-eu-vat-checkout-
   block.php on line 268`
 * This warnings occur when a customer without VAT enters the checkout page.
 * Can you fix it?
 * Regards.
    -  This topic was modified 3 weeks, 6 days ago by [kuebk](https://wordpress.org/support/users/kuebk/).

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Author [Algoritmika](https://wordpress.org/support/users/algoritmika/)
 * (@algoritmika)
 * [3 weeks, 3 days ago](https://wordpress.org/support/topic/undefined-array-key-is_vat_valid/#post-18969079)
 * Hi, [@kuebk](https://wordpress.org/support/users/kuebk/),
 * Sorry for not getting back to you sooner, and thank you for pointing it out. 
   We’ll fix that in the next plugin version.
 *  Plugin Contributor [Tom Anbinder](https://wordpress.org/support/users/anbinder/)
 * (@anbinder)
 * [3 weeks, 2 days ago](https://wordpress.org/support/topic/undefined-array-key-is_vat_valid/#post-18969391)
 * Hi, [@kuebk](https://wordpress.org/support/users/kuebk/),
 * Please update the plugin to the latest v4.7.4, the issue should be fixed now.

Viewing 2 replies - 1 through 2 (of 2 total)

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 * ![](https://ps.w.org/eu-vat-for-woocommerce/assets/icon.svg?rev=2969433)
 * [EU/UK VAT Validation Manager for WooCommerce](https://wordpress.org/plugins/eu-vat-for-woocommerce/)
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 * 3 replies
 * 3 participants
 * Last reply from: [Tom Anbinder](https://wordpress.org/support/users/anbinder/)
 * Last activity: [3 weeks, 2 days ago](https://wordpress.org/support/topic/undefined-array-key-is_vat_valid/#post-18969391)
 * Status: not resolved