Federal prosecutors are seeking to recover funds from an online cryptocurrency fraud scheme and the scammers that swindled a Massachusetts resident out of half a million dollars, the Office of US Attorney Leah B. Foley said Monday.

A civil forfeiture action filed by Foley’s office seeks to recover an approximate $200,000 or the equivalent of 200,000.039646 in Tether crypto, according to a statement.

The victim in Massachusetts met the alleged perpetrator on the Tinder online dating site. He went by “Nino Martin” and said he was a financial adviser, Foley’s office said.