投訴信的兩種主要類型: 第一種，投訴有缺陷的產品，而第二種是投訴令人失望的服務(如餐館、假日)。
考生應該避免犯以下的錯誤：
首先，不要坦率地表達你的情緒；語氣不要令人感到生氣，諷刺和威脅。
例句1：我對你們的服務感到非常失望；
例句2：你們航空公司的工作人員真差勁!
其次，不要提出不合理的要求。
例句1：請升級到商務艙！
如何正確解答這個問題？我們先看看作答框架吧！
第一段：引言–表達你寫這封信的目的
例句1：I am writing to complain about xxx. (我寫信是為了投訴。)
例句2：I wish to express my dissatisfaction with the xxx, which I purchased on xxx at your shop. (我想對在貴店…購買的…表達我的不滿。)
第二段：簡明扼要地陳述您的投訴。
第三段：說明您希望公司如何解決此問題，包括具體行動和截止日期。
例句1：I would appreciate it if you could replace the missing part by next week /offer me a refund of the item. (如果你能在下周之前替換掉缺失的部分/給我退款，我將不勝感激。)
例句2：請儘快讓我知道你打算採取什麼措施。
例句3：我希望在接下來的五天內收到您的來信。
Sample Essay
Dear Sir,
I am writing with regard to a flight that I missed due to a mistake by one of your employees.
Two weeks ago, I was due to catch a flight to Egypt, where I intended to spend four days of holiday. Unfortunately, the attendant at the check-in desk gave me a boarding card for a different flight. I did not notice the mistake until I arrived at the departure gate and it was too late.
Owing to the error, I was not allowed to board the flight to Egypt, and this caused me great inconvenience. I had to book a new flight two days later, which meant that I missed two days of my holiday. Worse still, I spent an extra HK$6200 to buy another ticket.
As the mistake was caused by your company, I hope that you will compensate me for the cost of the additional flight, as well as for my transportation costs.
I look forward to receiving your response.
Yours faithfully,
Chris Wong
範文分析：
在第一段，範文也是只用一句話闡述了為什麼他寫這封投訴信，即”regard to a flight that I missed due to a mistake by one of your employees”，由於機場一位員工的失誤他錯過了航班。
在第二段，範文詳細地描述了整件事情發生的過程，裏面提到有兩個原因造成他錯過航班。第一個原因是，”the attendant at the check-in desk gave me a boarding card for a different flight”, 值機櫃檯的服務員給了他一張不同航班的登機牌；第二個原因是，”I did not notice the mistake”, 他並沒有注意到這個錯誤。結果就是”I arrived at the departure gate and it was too late”, 他到了登機門的時候才發現，只是太晚了。
在第三段，範文寫到了因為錯過航班，”this caused me great inconvenience”，給他帶來了極大的不方便。有兩個不便之處，第一個是”I had to book a new flight two days later”, “I spent an extra HK$6200 to buy another ticket”, 他只能預定兩天後的一個新航班，多花了6200港元買了另一張機票；第二個是，他的假期本來有四天，但是因為只能預定兩天後的機票，所以”I missed two days of my holiday”，他也錯過了兩天的假期。
在第四段，範文明確說明了他希望航空公司怎麼做，即”compensate me for the cost of the additional flight, as well as for my transportation costs”, 賠償他額外的飛行費用（6200港元），以及他原先的機票費用。
在最後一段，則是一個常用的句子，”I look forward to receiving your response”，期待您的回復。他希望航空公司儘快回復他的信件。
整篇範文非常的完整，從他為什麼寫這封投訴信，到描述錯過航班整件事情的發展經過，再到闡述錯過航班對他帶來許多不便，最後是明確提出航公公司應該怎麼賠償他，寫的非常的流利順暢，而且他的索賠方案也是在合理範圍之內。所以，這是一篇非常好的範文。
