_____________________ [Mention the name of the recipient]
_____________________ [Mention the Designation of the recipient]
_____________________ [Mention the recipient’s company’s name]
_____________________ [Mention the recipient’s official address]
Date _____________ [Mention the date on which the letter is being written in dd/mm/yy format]
Sub: _________________ (Mention the purpose of writing the letter)
Dear/ Respected Mr. _____________ [Mention the last name of the recipient],
I am writing this letter to inform you that our firm has completed _________ (Mention the number of months/ years) and we are celebrating its anniversary. We expect each one of you to come and participate in the various sub-events that are being organized.
It has been great to be associated with you and we believe that this celebration would strengthen the bond further.
___________________ [Mention the name of the sender]
____________________ [Mention the Designation of the sender]
__________________________ [Company’s Name on behalf of which the letter is being written]