The federal law cases the consumer the right to make a debt collection agency to stop calling them or communicating with them. While he initiate request over the telephone you need to send a letter in writing asking them to stop calling you. This letter is called a cease and desist letter which tells the collector not to contact you anymore and should be sent through certified mail with return receipt requested. This way you’ll have proof of recommendation and request a cease and desist that you made to the collection agency. If the collection agency continues to contact you even after having received your request that they are in violation of the federal law and you can sue them for it. Each cease and desist letter will apply to the specific creditor that you send it to.