YOU SAID:
If I don't receive it by tomorrow please send it back to me.
INTO JAPANESE
明日までに届かない場合は返送してください。
BACK INTO ENGLISH
If you do not receive it by tomorrow, please return it.
INTO JAPANESE
明日までに届かない場合はご返送ください。
BACK INTO ENGLISH
If you do not receive it by tomorrow, please return it.
You've done this before, haven't you.