The federal lawsuit seeks to void a travel insurance policy that Gary Giordano, of Gaithersburg, took out in Robyn Gardner's name before their trip. The suit says the policy is void because Giordano and Gardner aren't married, aren't related and weren't business partners.
Giordano was arrested after Gardner went missing in Aruba. He has said she was swept out to sea while they were snorkeling. A judge ordered him released in November because of a lack of evidence.
Giordano has already sued an American Express subsidiary in Illinois to collect on the policy.
A lawyer for Giordano said the company still has to deal with his complaint.