You can call 911 and make a report. Or call the local law enforcement agency in the city/county where the crime occurred (or is occurring). If it's intentional, then the person(s) likely will be prosecuted. Otherwise, you can report it to the innocent spouses.

Who can file a complaint for bigamy?

Only the person aggrieved can complain in case of bigamy. If the aggrieved is the wife, then her father can complain under section 494/495 of the Indian Penal Code. A petition for declaration that the second marriage is void can be filed only by the parties to the marriage and not by the first wife.

What happens if you are charged with bigamy?

In California, misdemeanor bigamy results in up to one year in county jail, while felony bigamy results in up to three years in prison. ... However, in situations where the spouse is aware they are entering into a marriage while the other party is still legally married, the state can charge both with bigamy.