The public service broadcaster engaged in a "serious breach" of industry standards by not revealing that the voice of a documentary about the Gaza conflict was the child of a Hamas administrator, as ruled by regulatory body Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has concluded that the programme was "substantially inaccurate".
The head of the BBC had earlier expressed regret, stating there had been "a major oversight in relation to truthfulness".
The authority has ordered the corporation to air a evening declaration about its findings.
"Since this amounts to a serious breach of our code, we are directing the corporation to transmit a message of our conclusions against it on BBC Two at nine o'clock in the evening, with a date to be determined," it said.
'Risk to Damage Confidence'
The watchdog's report declared: "Our investigation found that the film's failure to disclose that the narrator's father occupied a role in the Hamas-administered government was significantly deceptive.
"Consequently that the audience did not have vital facts which may have been highly relevant to their assessment of the voice and the information he provided.
"Trust is at the core of the bond between a television network and its public, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This oversight had the potential to damage the exceptionally strong levels of trust that audiences would have invested in a documentary produced by the BBC about the conflict in Gaza."
The film was withdrawn from iPlayer in last February after the presenter's family links were revealed, and in July an broadcaster's internal assessment found it violated the organization's editorial guidelines on accuracy.
A corporation official said: "The regulator's decision is in line with the conclusions of the internal assessment, that there was a major oversight in the documentary in relation to the corporation's content standards on accuracy, which aligns with Rule 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 follow the sanction as soon as the date and wording are finalised."
