Cousion marriage under hindu marriage act

i know its void but is theri any way to conver marriage in Legal Way ?

To clarify your query:

In some communities, sister's son and brother's daughter though cousins can marry as the gotra, is different. Cousins with same gotra cannot marry. Any such marriage under the Hindu law and religion is void and cannot be registered under the Hindu Marriage Act or the Special Marriage Act.

There is a scientific reason for this. Progeny of very close relation like cousins from aunts or uncles (maternal as well as paternal) cannot be healthy, they can be born with congenital defects, which can bring life long sorrow.

Hence marriage between sapindas is void marriage and there is no legal way to marry.

i agree with vandana ji , HMA didn't allow between cousions , It is clearly stated in section 5 which is for condition for a hindu marriage , in its section 5 (iv) & 5(v);which restricts marriages in prohibited relationship & sapandas , unless the customs governing each of them permits of a marriage between them.