在国际商务活动或跨国事务中，授权书和委托书是常见的法律文件，用于明确授权方与被授权方之间的权利义务关系。以下是一份英文版授权书/委托书的范本，供参考使用。

POWER OF ATTORNEY AND AUTHORIZATION LETTER

To Whom It May Concern:

This letter serves as an official authorization and power of attorney, appointing [Name of Agent/Representative] as the authorized representative of [Your Company Name] to act on behalf of the company in all matters related to [specific purpose or task].

The undersigned hereby grants full authority to [Agent’s Name] to execute, negotiate, and finalize any agreements, contracts, or documents necessary for the completion of the aforementioned tasks. This includes but is not limited to:

- Conducting negotiations with third parties.

- Signing legal documents on behalf of [Your Company Name].

- Handling financial transactions as required.

[Agent’s Name] shall have the full authority to make decisions regarding the above matters within the scope of this authorization. The validity of this power of attorney shall commence from [start date] and end on [end date], unless otherwise terminated earlier by written notice from the undersigned.

All actions taken by [Agent’s Name] under this authorization will be binding upon [Your Company Name], and the company agrees to honor all obligations arising therefrom.

Signed at [Location], this [Date].

[Your Full Name]

[Title/Position]

[Your Company Name]

请注意，上述模板仅供参考，实际使用时需根据具体情况调整内容，并建议咨询专业律师以确保文件的合法性和适用性。此外，在正式签署前，请务必仔细核对所有信息是否准确无误。