英语邀请函格式：
封面上写“邀请函”二字，用美术字体或手写体，一般要有图案装饰。抬头顶格写被邀请组织的全体，如邀请的是个人，应写明其姓名及职衔、称谓。正文要写明邀请的事由，举行的时间、地点及注意问题。
落款处署明邀请单位全称或邀请者姓名，以及发出邀请函的时间，若是组织出面邀请，还应盖上公章。
英语邀请函范文：
Dear Mr. Harris
Mr. Mark Morgan and I are planning a small dinner in honor of John Smith, Executive Vice-president and Chief Technology Officer of the American Auto Company.?
The dinner will be held at the Hilton Hotel, Detroit, beginning at 6.30 p.m. on Wednesday, January 15, and dress will be informal business wear.
We hope that you will be able to join us in this opportunity to meet the senior executive of the American Auto Company.
We look forward to seeing you on Wednesday, January 15.
Yours sincerely,
Robert Miles
Chief Executive Officer
邀请函应该是为办理入境以及签证用，要不然两国之间会比较限制人员出入。我们之前就搞过这个，自己写一个比较正式的函件，写明这个人要来中国干什么，从哪天到哪天，在什么地方，写的详细一些比较好，之后通过传真发送给他，记住，一定要盖你们公司的章，然后他会连同他的护照什么的交给中国大使馆办理签证。我想就是这么些就行了