Dear sirmadam:
On [date]，we will host an evening of celebration in honor of theretirement of [name]，President of [pany]。 You are cordially invited to attthe celebration at [hotel]，[location]，on [date] to p。m。
[name] has been the President of [pany] since [year]。 During this period，[pany] expanded its business to 。 Now it's our opportunity to thank him forhis years of exemplary leadership and wish him well for a happy retirement。Please join us to say Good-bye to [name]。
See you on [date]。
Yours sincerely
[name]