祝贺信的格式同一般书信一样，有时有标题，有时没标题。
由于祝贺信是为祝贺别人而写的，首先内容应有祝贺谁？因什么事祝贺？这些事的意义？并要表示自己向别人学习的态度。
同时，写祝贺信应把握分寸，对别人的贡献的叙述、称许上要分寸得当，不能缩小，缩小是客观上贬损别人的成就；也不能夸大，夸大无异于是对别人的讽刺。
例如一位同学在国际奥林匹克数学竞赛中获奖了，如果说，这像在数学测验中考了第一那样荣耀，显然是缩小了人家的成绩，是对别人的贬损，国际奥林匹克的数学竞赛胜利显然比平常的数学测验难多了，不是贬损又是什么呢？
如果说别人的。竞赛胜利其意义超过了陈景润的哥德巴赫猜想，那也说过了头，等于是对别人的讽刺。
总之，要分寸把握得不温不火才好。
这类信是祝贺人家的成绩和贡献的，因此要热情洋溢、感情真挚、言出由衷。切忌为应付差事式的写祝贺信，那样效果不会理想。
祝贺信的写作格式可以比照一般书信的格式，即通常有信头、信内地址、称呼、正文、结尾语、签名等几个部分组成。但这里需要说明的是根据亲疏关系的不同，有些祝贺信是可以随意一些的，比如信内地址有时可以省略，而信头也大体可以写的简略一些。除此之外写祝贺信的时候还应该注意以下一些内容。
写祝贺信要充满热情、喜悦，说些鼓励、褒扬的话，使对方确实感到温暖和振奋。赞美对方切实做到实事求是，恰如其分，不要故意拔高，甚至献媚，以至无法起到应有的表示祝贺的目的`。
祝贺信要做到整洁、大方，用词要恰当、简练，篇幅不宜太长。写祝贺信时，所用信封和信纸都要经过认真选择，不能随意对付。
Dear Peter,
I would like to express mycongratulations to you on your receiving the first prize of “Chinese Bridge” Chinese speechcontest. I know that you were not good at Chinese at first. However, youpracticed speaking Chinese every day. As the saying goes, “Everything comesto him who waits”。 Finally, you succeeded! Inmy mind, this match is very difficult for a foreign student.
So I’m so surprised that you become champion of this competition. If you go on studying Chineseharder, you will have the opportunity to study in China. At last, I hope to seeyou and communicate with each oth[]er.
Sincere congratulations toyou again!
Yours,
Li Hua
祝贺信经典句型
1、我很高兴你梦想成真。
2、 我写这封信是为了表达我对你英语演讲比赛获得第一名的祝贺。
3、 祝贺你高考成功。
4、 请接受我最诚挚的祝贺和对未来最良好的祝愿。
5、 我希望你的未来是灿烂的。
6、 我们都为你所取得的巨大成就感到骄傲。
1、 I feel very happy for your dream has come true.
2、 I am writing to express my congratulations on your winning the first place in the English speech contest.
3、 Congratulations on your success in the National College Entrance Examination.
4、 Please accept my warmest regards.
5、 I hope your future will be glorious.
May 12, 1999
My dear Harold,
I have just received your letter telling me of your recent marriage. This happy event in your life prompts me to reply at once; and, in my own peculiar way ， to attempt to offer you my hearty congratulations and good wishes.
Sometimes the question is asked: “Who is to be congratulated more, the Lady or the Gentleman?” In this case I would unhesitatingly answer both. There is an ol d sa ying: “True marriages are made in Heaven.” I hope this is so in your case, and consequently, there will be on looking?back with regret for either of you.
Before going further, please let me sincerely wish that Peace, Health, Happiness ， and Prosperity may attend both your wife and yourself until the end. And now w hat can I or shall I say further? You know I have not as yet had much experience in hymeneal affairs, but I am a student; hence I read and observe, a nd endeavour to bring reason to bear upon earthly problems. It seems to me that co nnubial bliss, excellent and essential ， is by no means the only requirement.
Th ere is the great question of parentage. In this connection, I think it imperativ e that the character and physique of both father and mother should be as perfect as possible for scientific authorities assert that sons partake of the individu ality of the father ， and daughters that of the mother. I must say no more ， or you will conclude that I am a scientific man before my time.
With renewed good wishes, and kindest regards to you and your spouse.
Believe me，
Yours very sincerely,
Jimmie.