15years old girl 20 year old boy got married.
this marriage is void - ab - initio as girl was underage.
After 6years of marriage had a boy child, and after a year they have been separated
representation of husband-wife relation & child birth through such relation establishes marriage-like relations = marriage.
After 20 years of separation does the marriage still exists in legal way?
If the man want to remarry another women .... ??
first he has to obtain decree of nullity / divorce from a competent court only. No subregistrar deed / notarized agreement will serve the purpose.
otherwise second marriage will be treated bigamy. (severe punishment if proven)