Jetendar Maheshwari successfully completed the online course "Responsive Website Basics: Code with HTML, CSS, and JavaScript" offered through Coursera and authorized by University of London and Goldsmiths, University of London. The certificate verifies that Jetendar Maheshwari completed the course and their identity was confirmed by Coursera. The course instructors were Dr Matthew Yee-King, Dr Marco Gillies, and Dr Kate Devlin from the Computing Department at Goldsmiths, University of London.