The British broadcaster committed a "major breach" of media regulations by not revealing that the narrator of a film about the Gaza situation was the offspring of a Hamas representative, as ruled by regulatory body Ofcom.
An probe by the media regulator into Gaza: How to Survive a Warzone has found that the documentary was "significantly deceptive".
The BBC's director general had earlier expressed regret, saying there had been "a serious error in relation to truthfulness".
Ofcom has directed the corporation to air a evening declaration about its findings.
"Given this constitutes a serious breach of our code, we are instructing the corporation to air a announcement of our conclusions against it on the BBC's second channel at nine o'clock in the evening, with a timing to be confirmed," the regulator stated.
'Possibility to Damage Confidence'
The watchdog's report declared: "Our investigation found that the documentary's lack of disclosure that the presenter's male guardian held a post in the Hamas-controlled government was materially misleading.
"It meant that the public did not have vital facts which may have been extremely pertinent to their assessment of the presenter and the details he provided.
"Trust is at the center of the bond between a media organization and its audience, especially for a public service broadcaster such as the British Broadcasting Corporation.
"This error had the potential to damage the very considerable levels of confidence that audiences would have put in a BBC factual programme about the conflict in Gaza."
The documentary was pulled from the online platform in the month of February after the boy's familial connections emerged, and in this past July an internal BBC review found it infringed the corporation's content policies on truthfulness.
A corporation official commented: "The regulator's decision is in accordance with the results of the internal assessment, that there was a major oversight in the film in relation to the corporation's content standards on factual correctness, which aligns with clause 2.2 of the regulator's media standards.
"We issued an apology for this and we accept the regulator's ruling in its entirety. We will adhere to the directive as soon as the date and language are determined."
