MFC-L9550CDW(T) FAQs & Troubleshooting MFC-L9550CDW(T) Not your product? Sort by: Updated Date Popularity 2 Results 1. 20/12/2018 I am experiencing issues sending a fax. 2. 27/03/2013 When I send a fax from the machine, an error "not register." or "not registered." is displayed. Fax FAQs & Troubleshooting