An official certificate is a document that proves or confirms something in a formal and authorized way. It is like getting official proof or evidence of something. Full definition
Comedy Defensive Driving is one of the few licensed agencies approved to print official certificates and issue them directly from their office. (comedydefensivedriving.com)
Upon completing the course successfully, you will receive an e-certificate of completion and depending upon the package you selected, a USPS mailed official certificate of completion for the court. (urbantrafficschool.com)
You can take grammar exercises and quizzes and get official certificates from reputed educational or publishing firms like McGraw - Hill based on your progress. (elearningindustry.com)