The British broadcaster was found to have committed a "major breach" of industry standards by not revealing that the narrator of a documentary about the Gaza situation was the child of a Hamas official, as ruled by UK media regulator Ofcom.
An investigation by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the programme was "significantly deceptive".
The head of the BBC had earlier expressed regret, stating there had been "a serious error in relation to accuracy".
The regulator has instructed the BBC to transmit a evening declaration about its decisions.
"Since this amounts to a major infringement of our regulations, we are instructing the corporation to transmit a message of our determinations against it on BBC2 at 9pm, with a timing to be finalised," the regulator stated.
'Potential to Undermine Confidence'
The watchdog's report said: "Our probe determined that the documentary's omission to reveal that the voice's parent occupied a post in the Hamas-controlled government was substantially inaccurate.
"It meant that the audience did not have vital facts which may have been very significant to their judgment of the voice and the details he provided.
"Trust is at the core of the bond between a broadcaster and its viewers, especially for a national broadcasting corporation such as the public broadcaster.
"This oversight had the potential to undermine the exceptionally strong degrees of confidence that viewers would have placed in a documentary produced by the BBC about the Israel-Gaza war."
The programme was withdrawn from iPlayer in the month of February after the boy's personal associations emerged, and in July an internal BBC review found it infringed the broadcaster's content policies on factual correctness.
A corporation official said: "The Ofcom ruling is in accordance with the conclusions of the internal assessment, that there was a major oversight in the film in relation to the broadcaster's journalistic policies on truthfulness, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept Ofcom's decision in complete. We will comply with the sanction as soon as the timing and wording are finalised."
