Faxzero used to provide a decent service. But, for the last several months, faxes to congress are not going through. When I reported the problem to Faxzero, their incompetent, rude "support" person (who goes by the name of Connie), kept insisting the fault lies with my computer (singular) --- even though I provided documentation that it occurs with six different computers, five different browsers, five different operating systems, different routers and different ISPs. I've switched to another service permanently. I suggest you do the same.