Common law marriages require that although not being formally married :-
(a) The couple must hold themselves out to society as being akin to spouses.
(b) They must be of legal age to marry.
(c) They must be otherwise qualified to enter into a legal marriage, including being unmarried.
(d) They must have voluntarily cohabited and held themselves out to the world as being akin to spouses for a significant period of time.
THE SUPREME COURT OF INDIA
CRIMINAL APPEAL NOS. 2028-2029__OF 2010
D. Velusamy -versus- D. Patchaiammal
Get the full JUDGEMENT here Live in Relationship