導語：邀請信分為兩種：一種屬于個人信函，例如邀請某人共進晚餐、參加宴會、觀看電影、出席典禮等。另一種邀請信則屬于事務信函，一般是邀請參加會議、學術活動等。下面是小編為大家整理的英語正式的邀請函格式，歡迎閱讀。
首先表明邀請對方參加的意圖以及會議或學術活動的`名稱、時間、地點；然后要對被邀請者的威望和學術水平等表示推崇和贊賞，表明如果被邀請者能夠接受邀請，會給會議或者活動帶來很好的影響；接著要說明會議或活動的相關事宜，最好是能引起對方興趣的事宜；當然不能忘了表達希望對方能夠參加的誠意；最后還要請收信人對發出的邀請做出反饋，如確認接受邀請。下面是一封邀請對方參加學術會議的信函：
Dear Professor Wang,
On behalf of the Ohio State University and the IEEE Computer Society, I would be very pleased to invite you to attend and chair a session of the forthcoming 2004 International Conference on Parallel Data Processing to be held in Bellaire, Michigan, from October 25 to October 28, 2004.
You are an internationally acclaimed scholar and educator. Your participation will be among the highlights of the Conference.
We sincerely hope that you could accept our invitation. As you know, this is
the 10th anniversary of the Conference and we plan to make it a truly international meeting. We have accepted many papers from several foreign countries, including two from China.
If you can come, please let us know as soon as possible, since we have to prepare the final program soon. We are looking forward to your acceptance.
Sincerely yours,
Peter White