Stefan Ionescu-Balaceanu and Ashley Wotten, of Whitby, Ontario, filed an application to conduct discovery in the United States, on Sept. 22, to identify who sent them threatening text messages. They argue that Mastercard, the Purchase-based credit card payments network, has information that would enable them to “unmask the perpetrator(s) of the harassing and threatening text messages inflicted” on them. Investigators he hired to trace the phone numbers identified a San Diego company that sells temporary, disposable “burner” phone numbers that conceal the caller’s identity. Therefore, Mastercard could identify the name and address of the card holder. They are asking federal court to allow them to serve Mastercard with a subpoena to reveal the card holder.