You must collect the mail in person and take along some form of identification
你必须携带本人身份证明亲自来取邮件。
As for you, I don't think you have to go in person.
你嘛，就不用亲自去了。
Is there any need for you to go in person?
用得着你亲自去吗？
He never appeared in person unless it was absolutely essential.
不到万不得已，他不亲自出马。
He can't attend the meeting in person.
他不能亲自参加会议。