The British broadcaster committed a "significant breach" of media regulations by omitting to mention that the narrator of a film about the Gaza situation was the child of a Hamas official, as determined by British broadcasting authority Ofcom.
An investigation by Ofcom into Gaza: How to Survive a Warzone has concluded that the programme was "substantially inaccurate".
The head of the BBC had previously apologised, stating there had been "a serious error in relation to accuracy".
The authority has directed the corporation to air a evening statement about its findings.
"Given this constitutes a serious breach of our rules, we are instructing the BBC to transmit a message of our findings against it on the BBC's second channel at nine o'clock in the evening, with a date to be confirmed," it said.
'Possibility to Undermine Credibility'
The watchdog's statement declared: "Our investigation found that the programme's failure to disclose that the narrator's parent occupied a role in the Hamas-administered government was substantially inaccurate.
"This implied that the public did not have critical information which may have been very significant to their evaluation of the presenter and the details he presented.
"Confidence is at the heart of the relationship between a television network and its audience, particularly for a state-funded media outlet such as the public broadcaster.
"This oversight had the potential to erode the very considerable degrees of credibility that audiences would have placed in a documentary produced by the BBC about the conflict in Gaza."
The film was removed from the BBC's streaming service in last February after the narrator's familial connections emerged, and in this past July an internal BBC review determined it breached the organization's editorial guidelines on factual correctness.
A representative for the broadcaster stated: "The Ofcom ruling is in agreement with the results of the corporation's inquiry, that there was a major oversight in the documentary in relation to the corporation's content standards on accuracy, which reflects Rule 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we agree with the regulator's ruling in complete. We will follow the directive as soon as the date and language are determined."
