This letter simply refers a party involved in the same case to your attorney.
1234, Main Street
Boston, MA 02123
06 April, 2005
<Recipient Address Goes Here>
Re: <insert case name>
Please be advised that I have retained an attorney to represent me in the above-referenced matter. In the future, please address all correspondence, inquiries or demands to <attorney name> at <name of firm>.
encl: <List of enclosed items goes here>