5．抄送（
Carbon Copy /Copy Notation /c.c）。“抄送”用來告訴收件人收到這封信的還有哪些人。

如果你寫的這封信需要同時交給收信人以外的其他相關個人過目，或按規定提交其他部門或單位存檔，例如，寄給我方的律師、會計師和公司有關部門備案等第三方，則需要在信函中予以說明。

6．附言（
Postscript/P.S）。“附言”又稱“再啟”、“又及”。寫完信后發現忘記或又想起還有什么重要的事情要說，可以在此項下補出；它的另外一個用途是強調信中談及的要點，因此語言要簡練。

正式的商務信函中盡量不要使用“附言”，因為這會表明寫信人計劃欠周。商務信函的具體寫法如下圖所示。
Heading(generally typed or printed) Reference Number
Date Inside Address Attention Line Salutation Subject Line Body Thank you very much for your letter on March the 5th. We are the
leading exporter in textile products for many years….
Complimentary Close
Signature(pen-written)
Signature(printed)
Enclosure Notation
Postscript
Carbon Copy Notation
二、商務信函的格式
與一般的信函相比，英語商務信函特別講究格式和體例，具有鮮明的商務特色，在頁面結構、體例格式、標點符號等各個方面都有一定的套路和具體的表現形式。常用的英語商務信函的格式有三種。
1．齊頭式。齊頭式又稱“平頭式”。特點是信函的每一組成部分的每一行，包括日期、信內地址、稱呼、正文、結尾敬語、簽名等，都從左邊頂格寫起。
這種格式的優點是省時省事，可以提高打字速度，所以越來越多地應用于商務書信中。缺點是看上去頁面左邊密密麻麻，右邊卻是空空如也，顯得不夠均衡。
例信：
BUSINESS CORRESPONDENCE INSTITUE
Beijing China

Tel: 46-2161 Our ref.: Dep. B/3 Your ref.: AC/XX
5th July, 2007

Mr. Huang Li
Account Manager
65 Nathan Road
Kowlon
HONG KONG

Dear Mr. Huang,

We thank you for your letter of June 29. As requested, we enclose the certificate and photo for
your reference.
We would be very glad to offer any further assistance. Please contact us if you need any
additional information.

Yours sincerely
Yu Junda
Managing Director

Encl.: as stated

2．縮進式。縮進式的特點是：把對收信人的尊稱、附件列表等放在左邊；把寄信人的地址、日期和簽名都列在信的右邊；信函正文每段開頭向右縮進一定間距；結尾敬語位于中間偏右處；一般采用封閉式標點符號。
注意：同一封信中的縮格數應該統一，如果一個地方縮進 3個字符，那么后面需要縮進的地方都應該是 3個字符。這種格式的優點是布局對稱美觀；缺點是縮行比較麻煩。例信：
Maxwell Company 563 Main Street Centerville, IL9870 U.S.A.
 April 17, 2007 Billboard Inc. 620 Broadway Metropolis, NY 4323
Gentlemen, 
Your firm has been recommended to us by Charles Evans Ltd., New York as a leading supplier of
office stationery.
Now we are thinking of getting a supply of office stationery from you. Please furnish us with a
catalogue, price list and brochure if available.
We are looking forward to your early reply.

Yours sincerely
Simon Nelson
 Managing Director
3．變體式。變體式又稱混合式或變體齊頭式，是對上述“齊頭式”的改良。變體式的特點在于日期、信內地址、結尾敬語、寫信人簽名等部分采用平頭式，而正文的每段開頭則縮進數格。
變體齊頭式使用方便，應用比較廣泛。
例信：

TIAN CHUNAG CORPORATION
Shenzhen, China
Tel: 46-2161

5 July, 2007
Mr. Huang Li Sales Supervisor Kangxing Company 65 Nathan Road Kowlon HONG KONG
Dear Mr. Huang,
Electronic Components for Computers
Your firm has been recommended to us by Wangyin Corporation. We have heard that you are manufacturers of electronic components and therefore would be grateful if you will send us a fully illustrated catalogue showing your various specifications. We also expect you to quote us your best prices for your products. We are very large manufacturers of computers here and have had a considerable demand for your products. It is likely that we could place substantial orders with you if your prices and qualities are attractive enough. We also hope that you will be able to allow discount facilities and let us know what special terms you can allow for orders. We are looking forward to your early reply.
　
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