Had problem register from app it says my ID been registered before, finally problem solved by registering through JPJ website https://public.jpj.gov.my/public/login.zul

Click Daftar and register, wait for email (need patient ya cos I waited 1 hour for the email to arrive maybe need longer time now cos server busy).

Then proceed to log in MyJPJ app with the ID and password you set.

Its not about compulsory or what.

Someone can just create a script for register and run brutforce to get all information among those who havent register. Worst they could sell the data. Your home address there.

Or ah long try to locate you 10 years hutang, old ic got old info. U update the latest home address when renew. They register using ur ic, walla, they got your latest address.