Certified Lead Firms When deciding which certified firm to choose, ask the firm to provide you with a copy of their certification credentials and references of recent clients and completed jobs. Renovation Firms Visit Renovation Certification to learn how to become a certified lead renovator in Alabama. Alabama Certified Lead Renovator and Sampling Technician Firms (Updated 5/16/13) Certified Renovator Training Providers Abatement Firms Visit Abatement Certification to learn how to become a certified firm in Alabama. Alabama Certified Lead Firms (Updated 4/5/13)