Mail a letter to the collection company and ask it to stop contacting you. Keep a copy for yourself. Consider sending the letter by certified mail and paying for a “return receipt.” That way, you’ll have a record the collector got it. Once the collection company gets your letter, it can only contact you to confirm it will stop contacting you in the future or to tell you it plans to take a specific action, like filing a lawsuit. If you’re represented by an attorney, tell the collector. The collector must communicate with your attorney, not you, unless the attorney fails to respond to the collector’s communications within a reasonable time.