The BBC was found to have committed a "serious breach" of broadcasting rules by failing to disclose that the presenter of a film about the Gaza conflict was the son of a Hamas representative, as ruled by UK media regulator Ofcom.
An investigation by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the film 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 broadcaster to air a evening declaration about its findings.
"Given this constitutes a serious breach of our rules, we are instructing the BBC to transmit a message of our determinations against it on BBC Two at 9pm, with a timing to be confirmed," the statement read.
'Possibility to Undermine Confidence'
The authority's report stated: "Our probe determined that the documentary's failure to disclose that the narrator's male guardian served in a role in the Hamas-controlled administration was significantly deceptive.
"It meant that the viewers did not have critical information which may have been highly relevant to their judgment of the presenter and the details he presented.
"Credibility is at the core of the bond between a broadcaster and its public, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This error had the risk to erode the exceptionally strong degrees of credibility that audiences would have placed in a factual film from the broadcaster about the Gaza conflict."
The programme was pulled from the BBC's streaming service in February after the narrator's personal associations were revealed, and in the month of July an internal BBC review determined it breached the organization's editorial guidelines on factual correctness.
A representative for the broadcaster commented: "The regulator's decision is in agreement with the findings of Peter Johnston's review, that there was a serious error 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 accept Ofcom's decision in full. We will follow the directive as soon as the schedule and wording are determined."
