Not finally established, settled or confirmed.(adjective)
Not having undergone the ritual of confirmation.(adjective)
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Use "unconfirmed" in a sentence
"However, though the famous story must remain unconfirmed, a lesser-known, but equally sensational one can be unfolded in its place .."
"We've clearly debunked thing here on FR that snopes continues to insist are "unconfirmed" - they are indeed at the very least sympathetic to the left."
"Apparently it’s upto 20 dead (after seeing the picture of the packed bus, this will rise), 2 officially confirmed, and Al Qaeda have apparently unnofficially taken responsibility (again unconfirmed)."