What is the difference between Certified and Non-Certified Translations?

Certified translations have been created and tested strictly in accordance with industry good practices by Clinical Outcomes or other recognised translation company and come with a Certificate of Translation confirming methodology used (which includes as a minimum Dual Forward and Dual Back Translation plus Cognitive Debriefing). Non-certified translations may still be of very high quality and follow good practices, but do not come with official certificates of translation, only letters stating the methodology used for their translation.