The British broadcaster was found to have committed a "significant breach" of media regulations by failing to disclose that the narrator of a documentary about the Gaza situation was the son of a Hamas representative, as determined by British broadcasting authority Ofcom.
An investigation by the broadcasting watchdog into Gaza: How to Survive a Warzone has concluded that the programme was "significantly deceptive".
The chief executive of the broadcaster had previously apologised, noting there had been "a major oversight in relation to accuracy".
Ofcom has instructed the corporation to transmit a evening announcement about its conclusions.
"Given this constitutes a serious breach of our regulations, we are instructing the corporation to air a announcement of our determinations against it on the BBC's second channel at 9pm, with a timing to be confirmed," it said.
'Risk to Undermine Confidence'
The watchdog's statement stated: "Our probe concluded that the documentary's failure to disclose that the voice's male guardian occupied a role in the Hamas-run authority was significantly deceptive.
"It meant that the viewers did not have critical information which may have been extremely pertinent to their assessment of the narrator and the content he provided.
"Trust is at the heart of the connection between a television network and its audience, especially for a state-funded media outlet such as the public broadcaster.
"This error had the possibility to undermine the significantly high levels of credibility that audiences would have invested in a BBC factual programme about the Gaza conflict."
The film was withdrawn from iPlayer in last February after the presenter's family links emerged, and in July an broadcaster's internal assessment concluded it breached the broadcaster's journalistic standards on accuracy.
A BBC spokesperson stated: "The regulator's decision is in accordance with the conclusions of the corporation's inquiry, that there was a serious error in the film in relation to the BBC's Editorial Guidelines on accuracy, which aligns with regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept the authority's determination in full. We will comply with the sanction as soon as the timing and wording are determined."
