ANNOUNCEMENT TO CUSTOMERS: CLOSURE OF BUSINESS

Dear Felix

As you may know, [FIRM NAME, ex. ABC Co.] will be closing its business on [DATE, ex. June 30].

I am writing to thank you for your business with us during the past [DURATION, ex. five years.] Indeed, it has been a pleasure to serve you. Please call me if there is anything I can do for you before the date of closure.

Regards
Lydia