The BBC was found to have committed a "serious breach" of media regulations by not revealing that the voice of a documentary about the Gaza conflict was the son of a Hamas official, according to regulatory body Ofcom.
An inquiry by the broadcasting watchdog into Gaza: How to Survive a Warzone has concluded that the film was "substantially inaccurate".
The BBC's director general had earlier expressed regret, stating there had been "a major oversight in relation to factual correctness".
The regulator has ordered the broadcaster to air a evening declaration about its findings.
"Given this constitutes a significant violation of our regulations, we are instructing the broadcaster to broadcast a statement of our determinations against it on BBC Two at nine o'clock in the evening, with a schedule to be confirmed," the statement read.
'Possibility to Damage Credibility'
The watchdog's announcement declared: "The inquiry we conducted found that the documentary's failure to disclose that the presenter's father occupied a position in the Hamas-administered government was materially misleading.
"Consequently that the public did not have vital facts which may have been highly relevant to their judgment of the presenter and the content he provided.
"Trust is at the heart of the relationship between a media organization and its audience, especially for a state-funded media outlet such as the BBC.
"This failing had the risk to undermine the significantly high levels of credibility that audiences would have put in a BBC factual programme about the conflict in Gaza."
The film was pulled from the BBC's streaming service in the month of February after the boy's personal associations came to light, and in this past July an broadcaster's internal assessment concluded it violated the organization's editorial guidelines on truthfulness.
A BBC spokesperson stated: "The regulator's decision is in accordance with the conclusions of Peter Johnston's review, that there was a significant failing in the documentary in relation to the corporation's content standards on accuracy, which aligns with regulation 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we comply with the regulator's ruling in its entirety. We will comply with the directive as soon as the date and wording are finalised."
