Kathleen Mullin, who said she represented one of the prostitution ring's employees, said her client and other women who worked for the Emperors Club have been asked to testify before the panel, CNN reported.

Mullin, while not identifying her client, said her client wasn't the woman identified as "Kristen" and allegedly linked to Spitzer in court papers.

Spitzer resigned Wednesday after his alleged association with the high-priced prostitution ring became public two days earlier. Spitzer, whose resignation is effective Monday, hasn't been charged.

Asked whether her client had any encounters with Spitzer, Mullin said, "We have no information regarding the governor."

An affidavit identified clients by number, with Spitzer as "Client 9," a source told CNN. The affidavit said Client 9 paid $4,300 for 2 1/2 hours with a prostitute, identified as "Kristen," he arranged to meet Feb. 13 at Washington's Mayflower Hotel.

The investigation began when New York's North Fork Bank notified the U.S. Treasury Department about suspicious transfers of money from Spitzer's bank accounts.