The public service broadcaster committed a "major breach" of broadcasting rules by not revealing that the voice of a documentary about the Gaza situation was the offspring of a Hamas representative, according to regulatory body Ofcom.
An inquiry by Ofcom into Gaza: How to Survive a Warzone has concluded that the film was "materially misleading".
The chief executive of the broadcaster had already issued an apology, noting there had been "a major oversight in relation to accuracy".
Ofcom has directed the corporation to transmit a peak-time statement about its decisions.
"Since this amounts to a serious breach of our rules, we are directing the BBC to air a announcement of our determinations against it on the BBC's second channel at nine o'clock in the evening, with a date to be determined," it said.
'Potential to Undermine Trust'
The authority's report said: "Our investigation concluded that the documentary's lack of disclosure that the narrator's parent served in a post in the Hamas-run government was significantly deceptive.
"Consequently that the audience did not have vital facts which may have been highly relevant to their evaluation of the voice and the information he shared.
"Credibility is at the heart of the relationship between a broadcaster and its viewers, notably for a public service broadcaster such as the BBC.
"This failing had the possibility to erode the exceptionally strong amounts of confidence that the public would have put in a factual film from the broadcaster about the Gaza conflict."
The programme was pulled from iPlayer in February after the presenter's personal associations were revealed, and in the month of July an corporation's own inquiry determined it violated the organization's editorial guidelines on truthfulness.
A representative for the broadcaster commented: "The regulator's decision is in line with the conclusions of the corporation's inquiry, that there was a major oversight in the film in relation to the corporation's content standards on truthfulness, which reflects clause 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we comply with the authority's determination in complete. We will adhere to the penalty as soon as the timing and wording are determined."
