[Date]

[Addressee]

Dear [Name]:

It is my great pleasure to advise you that [name of new
sales representative] will now be representing our firm
in your area.

[name of individual] has been handling our accounts in
[locale] for some time and is extremely knowledgable in
the field of [specify]
Your new representative is scheduled to visit your office on
[date].

Yours very truly,