The agency relationship must be based on written authorization and be notarized.

代理关系必须由书面授权，并经过公证。

youdao

Customer Concession: Written authorization to use or release a product which does not conform to specified requirements.

顾客让步：对于不符合规定要求的产品需书面授权于使用或放行。

youdao

Provided that you are in possession of a written authorization from the owners, you can complete the Return on their behalf.

如果你持有业主的书面授权书，就可以代业主填写物业税报税表。

youdao

On the one hand, sure without any doubt registered persons should not accept account instructions from a spouse absent prior written authorization.

FORBES: Husband's Unauthorized Withdrawals Land Stockbroker In Hot Water

No registered person should ever initial or sign on behalf of a customer without first securing prior written authorization from both the employer firm and the customer.

FORBES: Former Chase Broker Initials And Signs His Way Out Of A Job

Is "The Big Miss, " written without Woods's authorization, a violation?

WSJ: Honoring Tiger Woods for What He Is