Sample Letter: "Drop Dead"

(Date) 
 
To Whom It May Concern: 
 
I have been contacted by your company about a debt you allege I owe. I am instructing you not to contact me further in connection with this debt. Under the Fair Debt Collection Practices Act, a federal law, you may not contact me further once I have notified you not to do so. 
 
Sincerely, 
 
(Name) 
 
(Account No.)