邀请信包括宴会、舞会、晚餐、聚会、婚礼等各种邀请信件，形式上大体分为两种:一种为正规的格式(formal correspondence)，亦称请柬;一种是非正式格式(informalcorrespondence), 即一般的邀请信。
邀请信是在形式上不如请柬那样正规，但也是很考究。
书写时应注意: 邀请信一定要将邀请的时间(年、月、日、钟点)、地点、场合写清楚，不能使接信人存在任何疑虑。例如:“I’d like you and Bob to come to Luncheon next Friday.”这句话中所指的是哪个星期五并不明确，所以应加上具体日期, “I’d like you and Bob to come to luncheon next Friday, May the fifth.”
展会英文邀请函参考范文
LETTER OF INVITATION
Dear Sirs/Madam:
We hereby sincerely invite you and your company representatives to visit our booth at The Continental Exhibition Center from April 15th to 20th 2006.
We’re one of the manufacturers specialized in sanitaryware, concluding one & two piece toilet, wash basin, cabinet basin, pedestal basin, bidet, urinal, counter basin , decorated ceramics and so on. Our new models offer superb design and their new features give them distinct advantages over similar products from other manufacturers.
It would be a great pleasure to meet you at the exhibition.We expect to establish long-term business relations with your company in future.
Exhibition Center : The Continental Exhibition Center
Booth Number : G-K105 G-K-106
Date : Apr 15th to 20th 2006
Best Regards
Mr.Su Jia Jian
General Manager
[回复2]：The Continental Centre is a magnificent trade fair venue in Pazhou. You can reach us easily by any of the following 4 ways:
By Metro (Subway) ---Take Metro Line 2 toward Pazhou and get off at Pazhou Station (next to Xingang Dong), Exit D. (The fastest way when coming from Liuhua area)
By hotel shuttle bus--- All hotel buses will drive to Canton Fair Pazhou Complex via the Continental Centre. So simply ask the driver for a stop. (Esp. recommendable for buyers who stay in CACFair VFM hotels and partner hotels)
By CACFair shuttle bus---Take CACFair free shuttle bus when coming from Canton
Fair Pazhou Complex or Eastern Railway Station.
By taxi--- Simply ask taxi driver to take you to the Continental by showing CACFair address in Chinese as below.
CACFair address in Chinese:
[回复3]：看来广交会来了，还真是很多人要这发邀请函，我公司的格式如下：
Dear XXX,
We treasure every opportunity to meet with you, our valued customer.
From 28 April - 1 May 2006, we will be exhibiting at the "Hong Kong Gifts & Premium Fair 2006".
We cordially invite you to visit our booth.
Our booth number is 3D11 in Hall 3.
You may click here to find our location.
With Compliments
XXXX (COMPANY NAME)