Dear Felix
We are in receipt of your letter of [DATE, ex. June 10] addressed to [NAME, ex. Bill Williams]. We regret to inform you that [he / she] is no longer with our firm. {STATE WHERE EX-EMPLOYEE CAN BE REACHED, IF KNOWN, ex. He may now be reached at X Y C Co.:
Bill Williams X Y C Co.43211 Second Street Toronto, OntarioL3T 7N2]
We regret any inconvenience this may have caused you.
Regards
Lydia