non-paper
n.— «It is understood that British Foreign Secretary Jack Straw had given a non-paper on Kashmir problem to the Indian and Pakistani leaderships when he visited the subcontinent in the first week of February this year. In diplomatic parlance, a “non-paper” is used when a government is conveying a point to other government/governments or state actors while keeping nothing on record.» —“Dixit, Aziz hold secret talks in Delhi” by Rajeev Sharma, Girja Shankar Kaura in New Delhi Tribune (Chandigarh, India) Sept. 10, 2004. (source: Double-Tongued Dictionary)