Hello. A and B were married, had a daughter C. The couple got divorced by mutual consent and executed a notarized document of divorce. B , mother got custody of minor daughter C . B remarried and wants to go USA with her new husband alongwith her minor daughter C. Immigration authorities are refusing to give clearance to C and seeking proper custody documents of C and not accepting notarized divorce agreement.
How should B obtain custody order of her daughter C ? What documents are accepted by immigration authorities?
Anyone please suggest