As you asking here I am telling you online banking courses don't require registration and generally aren't available for credit. Some courses are available as video lectures, while others include lecture notes or assignments

You can do Banking Certification Courses Online from Finitiatives Learning India Pvt. Ltd.:
Mysore Office
# 1112, 10th Main,
Gokulam 3rd Stage, Mysore - 570002, Karnataka, India
Tel: +91 9243.666.002 / 003
Email: info@learnwithflip.com

Mumbai Office
401 B Wing, Annapurna Building, OppOshiwara Park Society,
Adarsh Nagar, Oshiwara, Andheri (W), Mumbai 400 053
Tel: +91 9920.418.357
Email: info@learnwithflip.com

Bangalore Office
No.2124 A, 2nd Floor, 6th Cross, 15th Main,
HAL 3rd Stage, Bangalore 560 008
Tel: +91 9243.666.003
Email: info@learnwithflip.com

International level institution for online banking course:

Kutztown University of Pennsylvania
Khan Academy
the Massachusetts Institute of Technology
Yale University
Massachusetts Institute of Technology
the University of California
Massachusetts Institute of Technology

Finitiatives Learning India Pvt. Ltd.