Duplicate orders are created.

/**
 * Prevent duplicate order
 */
add_filter('woocommerce_defer_transactional_emails', '__return_true' );
add_action( 'woocommerce_after_checkout_validation', 'forbid2orders', 10, 2 );

function forbid2orders( $fields, $errors ){
	$c_user_email = $fields['billing_email'];
	$c_transient_key = 'create_order_'.$c_user_email;
	$create_order = true;
	if(false === ($c_transient_results = get_transient($c_transient_key))){
		$c_transient_results = $fields['billing_email'];
		set_transient($c_transient_key, $c_transient_results, 3 * MINUTE_IN_SECONDS );
	}else{
		if($c_transient_results == $fields['billing_email']){
			$errors->add( 'validation', 'An order has already been created.  Please check your <a href="/my-account/orders/">Orders</a> or wait a few minutes to place a new one.' );
			
		}
	}
}

I am pasting the snippet here as it didn’t let me upload a php file as an attachment

Hello,

I am not happy with this response at all.

I cannot do what you request because I cannot have a sale where the website looks different than what clients know it to look like. And i need to have high volume of customers and orders to be able to simulate the problem so it cannot be done on a test environment.

I asked two specific questions, that I will add here again:

1. Have you had problems with duplicate orders and how have you solved them?

2. There was a solution proposed in the https://github.com/woocommerce/woocommerce/issues/14541 that tries to fix the problem by adding an extra check to the woocommerce_after_checkout_validation using a transient to see if you ordered in the last 3 minutes, and if so disallow you to order for that period of time. Do you think it is a good idea to implement something like this?

Are you able or willing to answer them? you have 60000+ help requests on this forum, I assume that doubled orders have come up from time to time. Also I am asking what impact adding that snippet might have on the theme itself…

I have no problem if you do not answer them if you outright let me know that if the problem is not 100% related to the theme than your support doesn’t cover it and can’t be bothered to give an answer to set you in the right direction at least. Just so we know where we stand and not waste each others time.

Best Regards.