Non-registration of marriage under section 8 of the Hindu Marriage Act, 1955:

Section 8(5) of the Hindu Marriage Act, 1955 provides that the validity of a Hindu marriage is not affected by any omission to register it, while section 8(2) lets State rules make registration compulsory and punish a contravention with fine. Non-registration therefore "does not invalidate the marriage but calls for imposition of penalty" where registration is compulsory; it does not make the marriage void or voidable.