The British broadcaster committed a "serious breach" of media regulations by not revealing that the narrator of a programme about the Gaza conflict was the son of a Hamas administrator, as determined by British broadcasting authority Ofcom.
An probe 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 previously apologised, stating there had been "a major oversight in relation to accuracy".
The authority has instructed the corporation to air a peak-time statement about its findings.
"Given this constitutes a serious breach of our regulations, we are instructing the broadcaster to transmit a announcement of our conclusions against it on BBC2 at nine o'clock in the evening, with a timing to be confirmed," the statement read.
'Potential to Damage Confidence'
The authority's announcement stated: "Our investigation concluded that the documentary's omission to reveal that the presenter's father served in a post in the Hamas-controlled authority was materially misleading.
"It meant that the public did not have vital facts which may have been highly relevant to their assessment of the voice and the details he provided.
"Confidence is at the core of the connection between a broadcaster and its viewers, especially for a public service broadcaster such as the BBC.
"This error had the risk to damage the significantly high degrees of credibility that the public would have placed in a BBC factual programme about the conflict in Gaza."
The programme was removed from the BBC's streaming service in last February after the boy's family links came to light, and in the month of July an broadcaster's internal assessment concluded it violated the corporation's journalistic standards on truthfulness.
A representative for the broadcaster stated: "The regulator's decision is in accordance with the findings of the internal assessment, that there was a serious error in the film in relation to the broadcaster's journalistic policies on accuracy, which corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we agree with the regulator's ruling in complete. We will adhere to the sanction as soon as the schedule and wording are confirmed."