Hi ms_im2real4u
debt collectors are bound by the laws of the fdcpa. The most important point in this law is that they should not call you before 8 in the morning and after 9 in the night. Besides they should have a prior consent of the person before making the contact. The collector must not call you repeatedly each day for recovering the debt amount.
If you know a debt collector going against the laws, you can record the phone calls for taking legal actions. Check the laws in your state first before taking this action. Most states allow recording of the phone call secretly but in some states, you will have to take the permission from both the parties before recording. If you do not inform him, the company might take actions against you.
You can also send a cease and desist letter for stopping the collection calls. Samples of this letter are available here in this forum. You can tailor it according to your needs and send it to their mailing address through certified mail with return receipt requested. Make sure that you give them the room to contact you through written correspondence only. If you do not mention this point clearly, they will assume that you are trying to avoid the debt and hence will take the matter to the court.
Read more of the debt collection laws mentioned in the FDCPA. Be well informed before dealing with a collection agency. You must not make a wrong move with them that can take the situation in the opposite way.
http://www.ftc.gov/os/statutes/fdcpa/fdcpact.htm