Six Sigma

Six Sigma Online provides free training and certification for the Six Sigma White Belt for the regular and Lean editions. This White Belt training is available industry-wise, too. At Six Sigma Online, the White Belt training and certification with exam is available for industries, including construction, call centre, customer service, distribution, eCommerce, engineering, finance, food service, and government.

To register yourself for the Six Sigma Master Black Belt (MBB), you need to make sure that you are meeting all the requirements which are needed:

1. having completed a Black Belt Level III Certification from a recognised organisation like The Council for Six Sigma Certification
2. You may need to pass the exam that tests your understanding of the Six Sigma Body, principles, and tools. 

After that, you can fill out an online form, provide necessary documentation, and pay the registration fee as specified by the certifying body.

I hope it will help.