The public service broadcaster was found to have committed a "significant breach" of industry standards by omitting to mention that the narrator of a programme about the Gaza conflict was the offspring of a Hamas official, according to UK media regulator Ofcom.
An inquiry by Ofcom into Gaza: How to Survive a Warzone has concluded that the programme was "materially misleading".
The chief executive of the broadcaster had already issued an apology, saying there had been "a significant failing in relation to accuracy".
Ofcom has instructed the BBC to broadcast a peak-time announcement about its conclusions.
"Given this constitutes a serious breach of our code, we are directing the BBC to air a announcement of our findings against it on BBC Two at nine o'clock in the evening, with a schedule to be confirmed," the regulator stated.
'Potential to Erode Credibility'
The watchdog's announcement declared: "The inquiry we conducted determined that the documentary's lack of disclosure that the narrator's father held a position in the Hamas-controlled administration was significantly deceptive.
"Consequently that the audience did not have critical information which may have been extremely pertinent to their judgment of the narrator and the information he provided.
"Trust is at the core of the relationship between a broadcaster and its public, notably for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the risk to damage the very considerable degrees of trust that audiences would have invested in a factual film from the broadcaster about the conflict in Gaza."
The documentary was pulled from iPlayer in the month of February after the boy's family links came to light, and in the month of July an broadcaster's internal assessment concluded it infringed the broadcaster's content policies on truthfulness.
A corporation official stated: "The regulator's decision is in agreement with the results of Peter Johnston's review, that there was a significant failing in the documentary in relation to the broadcaster's journalistic policies on factual correctness, which corresponds to regulation 2.2 of the regulator's media standards.
"We have apologised for this and we agree with Ofcom's decision in its entirety. We will follow the directive as soon as the timing and language are determined."
