The British broadcaster committed a "major breach" of broadcasting rules by failing to disclose that the presenter of a film about Gaza was the offspring of a Hamas administrator, according to regulatory body Ofcom.
An investigation by Ofcom into the documentary titled Gaza: How to Survive a Warzone has found that the film was "materially misleading".
The chief executive of the broadcaster had previously apologised, noting there had been "a serious error in relation to truthfulness".
Ofcom has instructed the broadcaster to air a prime-time declaration about its decisions.
"Given this constitutes a major infringement of our regulations, we are ordering the corporation to broadcast a statement of our findings against it on BBC Two at 9pm, with a date to be confirmed," the statement read.
'Risk to Erode Credibility'
The authority's report said: "Our probe concluded that the film's failure to disclose that the voice's father held a position in the Hamas-administered authority was significantly deceptive.
"It meant that the public did not have essential details which may have been very significant to their assessment of the narrator and the content he shared.
"Credibility is at the core of the connection between a broadcaster and its audience, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This error had the possibility to erode the significantly high levels of trust that the public would have put in a documentary produced by the BBC 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 the month of July an corporation's own inquiry concluded it violated the broadcaster's content policies on factual correctness.
A corporation official commented: "The regulator's decision is in line with the conclusions of the internal assessment, that there was a significant failing in the programme in relation to the corporation's content standards on factual correctness, which aligns with Rule 2.2 of the regulator's media standards.
"We expressed regret for this and we comply with Ofcom's decision in complete. We will adhere to the sanction as soon as the timing and wording are determined."
