Title: Error Processing Checkout.
Last modified: August 31, 2016

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# Error Processing Checkout.

 *  Resolved [pooja2384](https://wordpress.org/support/users/pooja2384/)
 * (@pooja2384)
 * [10 years, 1 month ago](https://wordpress.org/support/topic/error-processing-checkout/)
 * Hi ,
 * I am facing following error after selecting the payment method on checkout page:
 * 03-21-2016 @ 09:14:04 – QuickPay API Exception file: C:\wamp\www\wordpress\wordpress\
   wp-content\plugins\woocommerce-quickpay\classes\api\woocommerce-quickpay-api.
   php
    03-21-2016 @ 09:14:04 – QuickPay API Exception line: 189 03-21-2016 @ 09:
   14:04 – QuickPay API Exception code: 400 03-21-2016 @ 09:14:04 – QuickPay API
   Exception message: order_id: already exists on another payment
 * 03-21-2016 @ 09:14:04 – QuickPay API Exception Request URL: [https://api.quickpay.net/payments/](https://api.quickpay.net/payments/)
   
   03-21-2016 @ 09:14:04 – QuickPay API Exception Request DATA: currency=DKK&text_on_statement
   =&order_id=0106&variables%5Border_post_id%5D=106 03-21-2016 @ 09:14:04 – QuickPay
   API Exception Response DATA: {“**message”:”Validation error: order_id already
   exists on another payment”,”errors”:{“order_id”:[“already exists on another payment”]},”
   error_code”:”400″}** 03-21-2016 @ 09:14:04 – ——————–
 * [https://wordpress.org/plugins/woocommerce-quickpay/](https://wordpress.org/plugins/woocommerce-quickpay/)

Viewing 1 replies (of 1 total)

 *  Plugin Author [PerfectSolution](https://wordpress.org/support/users/perfectsolution/)
 * (@perfectsolution)
 * [10 years, 1 month ago](https://wordpress.org/support/topic/error-processing-checkout/#post-7192320)
 * Hi,
 * You have conflicting order numbers. In QuickPay you cannot have duplicate order
   numbers – nor can you reset the order numbers on the merchant account. I suggest
   you either create a different merchant account or prefix your order numbers in
   WooCommerce.
 * All the best!

Viewing 1 replies (of 1 total)

The topic ‘Error Processing Checkout.’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/woocommerce-quickpay_263a40.svg)
 * [Quickpay for WooCommerce](https://wordpress.org/plugins/woocommerce-quickpay/)
 * [Support Threads](https://wordpress.org/support/plugin/woocommerce-quickpay/)
 * [Active Topics](https://wordpress.org/support/plugin/woocommerce-quickpay/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/woocommerce-quickpay/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/woocommerce-quickpay/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [PerfectSolution](https://wordpress.org/support/users/perfectsolution/)
 * Last activity: [10 years, 1 month ago](https://wordpress.org/support/topic/error-processing-checkout/#post-7192320)
 * Status: resolved