In some cases, calling an opt-out number will not work. This typically occurs when the fax marketers are deliberately breaking or ignoring the law.
Look around on the fax to see if the sender included his sending fax number. If the sending number is not included on the fax, then you can use the *57 method to trace unwanted calls. However, you will first need to set up the *57 service with your service provider and there will be limitations on tracing the number, such as only tracing numbers in your local service area.
You can send complaints to the FCC by phone call, by email, by fax, by written letter, or by using the FCC online complaint form.
Unfortunately, this method will have no effect if the fax spammer is using fax-to-email software. If they are, they will simply see black emails in their inbox.
