You must collect the mail in person and take along some form of identification
你必須攜帶本人身份證明親自來取郵件。
As for you, I don't think you have to go in person.
你嘛，就不用親自去了。
Is there any need for you to go in person?
用得著你親自去嗎？
He never appeared in person unless it was absolutely essential.
不到萬不得已，他不親自出馬。
He can't attend the meeting in person.
他不能親自參加會議。