It may be adviseable to let the other party involved in the matter that was assigned know that you are no longer in the loop. This letter will do that.
1234, Main Street
Boston, MA 02123
05 April, 2005
<Recipient Address Goes Here>
Please take notice that on <Date of Assignment> we assigned and transferred our interest in the matter described below to <Assignee>. This assignment involves:
<Description of what was assigned.>
You should direct any subsequent notices, payments or questions regarding this matter to <Assignee> at <how to reach receiver>.
encl: <List of enclosed items goes here>