The public service broadcaster was found to have committed a "significant breach" of industry standards by not revealing that the narrator of a film about the Gaza situation was the son of a Hamas representative, according to regulatory body Ofcom.
An inquiry by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the film was "substantially inaccurate".
The head of the BBC had previously apologised, noting there had been "a significant failing in relation to truthfulness".
Ofcom has ordered the broadcaster to air a evening announcement about its decisions.
"Given this constitutes a major infringement of our code, we are directing the corporation to air a statement of our findings against it on the BBC's second channel at nine o'clock in the evening, with a timing to be confirmed," it said.
'Possibility to Undermine Trust'
The regulator's statement said: "Our investigation determined that the documentary's lack of disclosure that the narrator's father held a role in the Hamas-administered administration was materially misleading.
"This implied that the viewers did not have essential details which may have been very significant to their evaluation of the voice and the details he presented.
"Credibility is at the heart of the relationship between a television network and its public, particularly for a state-funded media outlet such as the BBC.
"This oversight had the potential to damage the significantly high levels of trust that viewers would have invested in a factual film from the broadcaster about the Gaza conflict."
The programme was pulled from the BBC's streaming service in last February after the narrator's family links emerged, and in the month of July an corporation's own inquiry determined it violated the organization's content policies on accuracy.
A corporation official stated: "The regulator's decision is in accordance with the results of Peter Johnston's review, that there was a serious error in the film in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with clause 2.2 of the regulator's media standards.
"We expressed regret for this and we comply with the authority's determination in full. We will comply with the directive as soon as the timing and wording are confirmed."
