1to address (a letter, package, email) or to send/direct something to a specified recipient (often used as '〜宛てに').
封筒に氏名と住所を宛ててください。
Please write the name and address on the envelope.
問い合わせは営業部長宛てにメールしてください。
Please send inquiries by email addressed to the sales manager.
この小包は友人宛てに宛てたものだ。
This parcel was addressed to a friend.
応募書類の宛先を間違えないように注意する。
Be careful not to address the application documents to the wrong recipient.