Title: Plugin causing checkout errors and duplicate orders
Last modified: April 28, 2026

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# Plugin causing checkout errors and duplicate orders

 *  [Wes Butler](https://wordpress.org/support/users/wesb2023/)
 * (@wesb2023)
 * [4 weeks, 1 day ago](https://wordpress.org/support/topic/plugin-causing-checkout-errors-and-duplicate-orders/)
 * Some of our sites using this plugin started having issues with duplicate orders
   coming through. We deactivated the plugin, and the duplicate orders stopped occurring.
   We re-enabled this plugin and the duplicate orders have started occurring again.
 * The customers are attempting to place their order, and are met with an error 
   message on the checkout page: [https://snipboard.io/aM0CWn.jpg](https://snipboard.io/aM0CWn.jpg)
   The customer thinks their order has not gone through, but in reality, it has 
   and they’ve been charged. The customer will then attempt to order again, and 
   sometimes three times, one of which will finally be successful.
 * We’ve found a potential plugin conflict between this plugin and [Print Invoice & Delivery Notes for WooCommerce](https://wordpress.org/support/plugin/woocommerce-delivery-notes/).
   When these plugins are deactivated, the duplicate orders and errors at checkout
   stop occurring. Anyone else experiencing anything like this?

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

 *  Plugin Support [KJ](https://wordpress.org/support/users/kjvextras/)
 * (@kjvextras)
 * [4 weeks ago](https://wordpress.org/support/topic/plugin-causing-checkout-errors-and-duplicate-orders/#post-18894663)
 * Hi [@wesb2023](https://wordpress.org/support/users/wesb2023/)! Just so we are
   clear, the duplicate orders are happening due to the plugin conflict? Can you
   confirm that there are no duplicate orders when only our plugin is enabled?
 *  Plugin Support [KJ](https://wordpress.org/support/users/kjvextras/)
 * (@kjvextras)
 * [3 weeks, 5 days ago](https://wordpress.org/support/topic/plugin-causing-checkout-errors-and-duplicate-orders/#post-18896480)
 * Hey! Just in case,
    - Verify the [latest plugin version](https://wordpress.org/plugins/mailchimp-for-woocommerce/)
      is being used.
    - Switch themes to the default WooCommerce one, deactivate all plugins except
      WooCommerce and Mailchimp for WooCommerce, and test the scenario again – ideally
      in a staging environment.
    - Test for conflicts by following this guide, WooCommerce: Fixing Theme and 
      Plugin Conflicts: [https://docs.woocommerce.com/document/how-to-test-for-conflicts/](https://docs.woocommerce.com/document/how-to-test-for-conflicts/)
    - If you use a caching service like Cloudflare, add an exclusion path for the
      Mailchimp for WooCommerce plugin to prevent caching conflicts. Set the exclusion
      path at the server level, typically by creating a rule for the “URL Path” 
      such as `/wp-content/plugins/mailchimp-for-woocommerce/`.
    - Try uninstalling and reinstalling the plugin from scratch and see if the problem
      persists.
    - Review any log errors in the plugin’s logs tab or enable the **Remote Diagnostics**
      in the Settings area of the plugin to allow our engineers to investigate further.
 * Plugin compatibility
    - Does your plugin work with dynamic pricing plugins?
    - Does the Mailchimp for WooCommerce plugin have any known conflicts with other
      plugins?
    - Is your plugin compatible with?
 * Regarding conflicts with other plugins, as of now, there are no known conflicts
   between our Mailchimp for WooCommerce plugin and others. However, please keep
   in mind that plugin interactions can vary based on specific setups and configurations.
 * When it comes to integrations with other plugins, we currently support integrations
   exclusively with official WooCommerce plugins. These official integrations are
   designed and tested to work seamlessly with our Mailchimp for WooCommerce plugin.
 * Let us know the best way we can help you

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

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 * ![](https://ps.w.org/mailchimp-for-woocommerce/assets/icon-256x256.png?rev=1509501)
 * [Mailchimp for WooCommerce](https://wordpress.org/plugins/mailchimp-for-woocommerce/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/mailchimp-for-woocommerce/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/mailchimp-for-woocommerce/)
 * [Active Topics](https://wordpress.org/support/plugin/mailchimp-for-woocommerce/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/mailchimp-for-woocommerce/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/mailchimp-for-woocommerce/reviews/)

 * 2 replies
 * 2 participants
 * Last reply from: [KJ](https://wordpress.org/support/users/kjvextras/)
 * Last activity: [3 weeks, 5 days ago](https://wordpress.org/support/topic/plugin-causing-checkout-errors-and-duplicate-orders/#post-18896480)
 * Status: not resolved