Disable Notifiaction to customer, when on hold order changes to processing order

Hey guys,
I have the following problem:

When a customer buys a product with the payment ABC (for example prepayment), he gets my special order notification with the order confirmation plus the legal texts in the appendix. This is a customer on hold order.

When a customer buys a product with the payment XYZ (for example credit card), he also gets my special order notification. This is a customer processing order.

For the appendix, I used this code in functions.php:

add_filter( 'woocommerce_email_attachments', 'my_email_attachments', 10, 3);
function my_email_attachments ( $attachments , $id, $object ) {
	
	if( $id === 'customer_on_hold_order' || $id === 'customer_processing_order'){

		$attachment_path = get_template_directory() . '/woocommerce/AGB.pdf';
		$attachments[] = $attachment_path;
		
		$attachment_path = get_template_directory() . '/woocommerce/Widerrufsbelehrung.pdf';
		$attachments[] = $attachment_path;

	}
	
	return $attachments;
}

The problem is now, that the customer gets in case of the payment ABC two identical e-mails, when the customer on hold order changes (manually by hand or automatically) to customer processing order – for example when the money of the prepayment has been received. So, how is it possible to disable the notification, when the on hold order changes to processing order?

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