商務英語信函的信頭也稱信端，其內容包括髮件公司的名稱、標誌、通訊地址、電話號碼、傳真號、電子郵箱等。書寫信頭的目的是為了方便收件人瞭解信函來自何處，併為回覆提供聯絡方式。
很多公司都會印製帶信頭的'信紙。一般來說，人們喜歡將簡單的信頭放在信紙上端居中，將複雜的信頭放在信紙的右側或上下兩端。在使用這種信紙列印信函時，一定要注意為信頭留出足夠的空間。
對於私人商務信函，如求職信等，信頭通常寫在信紙的右上方。
如果信函的長度超過兩頁，那麼從第2頁開始就不再需要信頭了，只需寫上頁碼、收件人姓名及日期。
英文地址的書寫和中文地址的書寫有很大區別，應遵循從小到大的原則。特別值得注意的是，地址中的標點符號需正確使用。當前的習慣做法是，行末一般不加標點符號，但行中間該加標點的地方，還是不應省略。門牌號碼與街道名稱之間不加標點，但是在城市與國家名稱之間必須用逗號分開。
The letterhead provides the sender's name，full address，the telephone number, fax number,cable address and e-mail address. If you use stationery，it is usually printed with such a heading at the top.
If you need to type out the letterhead，it is a common practice to place it in the top-right corner or the top-left corner of the first page. You can consider one of the following two forms: blocked or indented.
Full block form:
Chapel Hill Arts and Crafts Corporation
6123 Farrington Road
Apt. Gll
Chapel Hill，NC 27514
USA
Tel: (919) 929-6666
Fax: (919) 968-8888
E-mail: CHACC@yahoo. com
Indented form:
Chapel Hill Arts and Crafts Corporation
6123 Farrington Road
Apt. Gll
Chapel Hill，NC 27514
USA
Tel : (919) 929-6666
Fax: (919) 968-8888
E-mail: CHACC@yahoo. com
The choice of either of the two forms depends entirely on your preference. The main purpose
of designing it is to make it pleasing in form and easy to type. It is necessary，however, to point out that with the increasingly extensive use of computers today，writers of business letters tend to employ the full block form from the beginning to the end of the letter to save energy and time.