woocommerce_order_status_processing

add_action( ‘woocommerce_order_status_processing’, ‘custom_autocomplete_order’ ); function custom_autocomplete_order( $order_id ) { if ( ! $order_id ) { return; } $order = wc_get_order( $order_id ); // get status $status = $order->get_status(); if( $status == ‘processing’) $order->update_status( ‘completed’ ); } https://usersinsights.com/woocommerce-automatically-complete-orders/