Code to Change Order Received Text in WooCommerce

/* Change WooCommerce Order Received Text */
function wpflt_custom_thankyou_text( $thank_you_title, $order ){
	return 'Hello ' . $order->get_billing_first_name() . ', Thank You for your order! Please note that Orders will be kept On Hold until Manual Call Confirmation. Happy Shopping!';
}
add_filter( 'woocommerce_thankyou_order_received_text', 'wpflt_custom_thankyou_text', 20, 2 );

“Thank you. Your order has been received” is the default ‘Thank You‘ text for order placement in WooCommerce. If you want to customize the default ‘Thank You’ text, add the mentioned code to your child theme’s functions.php.

Change to your preferred thank you message in line 3. If you don’t want to mention customer’s name remove ‘ . $order->get_billing_first_name() . ‘ from the line.