The public service broadcaster was found to have committed a "serious breach" of media regulations by omitting to mention that the narrator of a film about the Gaza situation was the offspring of a Hamas official, as determined by regulatory body Ofcom.
An inquiry by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has found that the documentary was "substantially inaccurate".
The head of the BBC had already issued an apology, stating there had been "a major oversight in relation to factual correctness".
The authority has instructed the broadcaster to transmit a peak-time statement about its findings.
"Since this amounts to a serious breach of our rules, we are instructing the BBC to broadcast a message of our conclusions against it on BBC Two at 21:00, with a date to be determined," the statement read.
'Potential to Erode Credibility'
The watchdog's statement declared: "Our probe found that the documentary's lack of disclosure that the voice's father served in a post in the Hamas-run government was substantially inaccurate.
"It meant that the viewers did not have essential details which may have been highly relevant to their evaluation of the voice and the information he provided.
"Confidence is at the center of the bond between a media organization and its public, notably for a public service broadcaster such as the BBC.
"This oversight had the possibility to erode the exceptionally strong amounts of confidence that viewers would have placed in a BBC factual programme about the conflict in Gaza."
The film was removed from the BBC's streaming service in February after the presenter's familial connections emerged, and in this past July an corporation's own inquiry concluded it infringed the corporation's editorial guidelines on factual correctness.
A corporation official commented: "The regulator's decision is in agreement with the findings of the corporation's inquiry, that there was a significant failing in the film in relation to the corporation's content standards on truthfulness, which reflects clause 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we agree with the regulator's ruling in complete. We will follow the penalty as soon as the date and wording are finalised."
