посредством курьерской доставки(All parcels sent by courier delivery are tracked but we cannot track 1st class mail. | Depending on the size of your order, it will be dispatched either by Royal Mail or by courier delivery. Alexander Demidov)
с помощью курьерской службы(Having your certificate sent by courier service. If you would like to have your certificate sent to you using the DHL Express Worldwide service, rather than ... Alexander Demidov)