The BBC was found to have committed a "significant breach" of broadcasting rules by failing to disclose that the presenter of a documentary about the Gaza conflict was the child of a Hamas official, according to regulatory body Ofcom.
An probe by the media regulator into Gaza: How to Survive a Warzone has concluded that the film was "significantly deceptive".
The BBC's director general had earlier expressed regret, noting there had been "a significant failing in relation to accuracy".
The regulator has instructed the broadcaster to air a evening declaration about its findings.
"As this represents a major infringement of our regulations, we are instructing the BBC to air a announcement of our conclusions against it on BBC2 at nine o'clock in the evening, with a schedule to be determined," the regulator stated.
'Potential to Damage Credibility'
The regulator's statement declared: "Our probe concluded that the programme's omission to reveal that the narrator's male guardian occupied a position in the Hamas-run authority was materially misleading.
"This implied that the audience did not have critical information which may have been very significant to their evaluation of the narrator and the information he shared.
"Confidence is at the core of the bond between a television network and its audience, notably for a public service broadcaster such as the BBC.
"This failing had the potential to undermine the significantly high levels of trust that the public would have put in a BBC factual programme about the Israel-Gaza war."
The film was pulled from iPlayer in the month of February after the narrator's personal associations were revealed, and in this past July an corporation's own inquiry found it violated the organization's editorial guidelines on factual correctness.
A BBC spokesperson commented: "The regulator's decision is in agreement with the results of Peter Johnston's review, that there was a serious error in the programme in relation to the corporation's content standards on truthfulness, which reflects Rule 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we accept the authority's determination in complete. We will adhere to the sanction as soon as the schedule and language are confirmed."
