It's not true. I did quick search and found one which claim they give free course and certificate, simplilearn[dot]com/learn-blockchain-basics-skillup. Take note i don't know good or reputable is that website.
Alright, i just checked the site and they referred me to a four month program with Indian institute of technology kanpur starting Nov 2nd and they are asking for my phone number during registration. is that safe?
It might not, but am of the notion that it would serve as an evidence that I passed the program. I checked their course to write the exam is $99.9 to be renewed every two years at a lower fee and their book is almost $35 when mastering Bitcoin is free