Would you please wait this letter to see with the postages ?   Do you want to sent this letter by ordinary or registered mail ?   By ordinary airmail please .   Anything valuable in it ?   A post order for four hundred dollars .   In that case , you ’ d better have it registered .   Will I be informed that my friend gets the letter ?   Yes . When your friend gets it , he ’ ll sent the receipt which you send it by mail . then you can be sure he ’ s received . 