DUBAI, United Arab Emirates — Iran has acknowledged for the first time that it had an open court case involving Robert A. Levinson, a former F.B.I. agent who disappeared in 2007 under still-mysterious circumstances while on an unauthorized C.I.A. mission to the country.

In a filing to the United Nations, Iran said the case over Mr. Levinson was “ongoing” before its Revolutionary Court, without elaborating. The Associated Press on Saturday obtained the text of Iran’s filing to the United Nations’ Working Group on Enforced or Involuntary Disappearances.

“According to the last statement of Tehran’s Justice Department, Mr. Robert Alan Levinson has an ongoing case in the Public Prosecution and Revolutionary Court of Tehran,” the filing said.

The Washington Post initially reported on the continuing case.

Mr. Levinson was last seen alive about eight years ago, in a hostage video pleading for help and in photographs wearing a Guantánamo-style jumpsuit. The images did not disclose who was holding him, though the video has a Pashtun wedding song popular in Afghanistan playing in the background.