After successfully completing this training you will receive an official GWO Working at Height Refresher certificate. The obtained certificate is also registered in WINDA, the online database for GWO training. In this database you will find all your obtained GWO certificates.
This certificate as well as the WINDA registration are valid for 2 years and must be repeated every two years. You can repeat this by (again) following the GWO refresher training(s).