MINEOLA, N.Y. -- Jessica Hahn has been subpoenaed and granted limited immunity to testify before a grand jury about the money she received after a sexual encounter with TV evangelist Jim Bakker, her attorney said yesterday.

Attorney Dominic Barbara said Hahn was served two days ago with a subpoena to appear Sept. 21 before a federal grand jury in Charlotte, N.C. He said he expects to request a postponement until October, after Hahn's story appears in Playboy magazine.

Barbara said Hahn would cooperate fully. He said she is not a target of the investigation.

In a taped deposition, Hahn described being forced into sex with Bakker and another evangelist in December 1980. She reached a $265,000 settlement with PTL, but received only a small amount of the money before Bakker resigned. The lawyer said he expects Hahn to be questioned in connection with an investigation into whether the money she received was taken legally from the PTL organization.

Meanwhile, the Rev. Jerry Falwell asked ministry supporters to make one more "sacrificial gift" by Labor Day to help PTL meet its $20 million fund-raising goal.

Falwell, who took over the ministry in March when Bakker stepped down, announced in May that the financially troubled television ministry would need at least $20 million to survive the summer. Three months later, PTL is about $2 million short of that goal, Falwell said.

"In the middle of May, for a ministry in great turmoil and in the headlines of every newspaper in the country, some people were doubting we could raise $2,000, much less $20 million in this long, hot summer ahead," Falwell said.

"But we're happy to tell you we're about $18 million along the way. We've got about $2 million left to go," Falwell said on the daily "PTL Club" show. "Our prayer is that on September 7, Monday, we can make a glorious announcement that the $20 million was in fact raised."

During June, PTL filed for protection from its creditors under Chapter 11 of the federal bankruptcy code. The return of ousted Jim and Tammy Faye Bakker to their ministry-owned home at Tega Cay, S.C., mobilized groups opposed to Falwell's leadership.

Falwell said upheaval at the ministry mangled fund-raising efforts during the summer, usually a difficult time for charities.

"It seems that right now, people are taking that last vacation effort and we just aren't hearing from the people we need to," Falwell said. "We've come to the end of a long, long, difficult summer. It would be a shame to get this close to victory and not make the rest of it."