Your oral request is valid for only 10 days, unless you confirm it in writing within 7 days of making the request. Written request are valid until you write to the collector removing the restriction. Contact you directly, if you have told the creditor or collection agency to only contact your attorney. Falsely threaten to take legal action. Use profane or obscene language.
Federal law provides some additional protections against debt collection agencies.
Collectors must stop calling you if, within 30 days after you are first contacted, you send the agency a letter indicating that you do not owe the debt. They can only renew their collection activities if you are sent proof of the debt. You may stop a debt collector from contacting you. Write a letter to the collector telling them to stop contacting you. Once the collection agency receives your letter, they may not contact you again except to say there will be no further contact.