The British broadcaster engaged in a "major breach" of industry standards by not revealing that the presenter of a documentary about Gaza was the child of a Hamas official, as ruled by regulatory body Ofcom.
An investigation by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the film was "substantially inaccurate".
The BBC's director general had already issued an apology, stating there had been "a serious error in relation to truthfulness".
The authority has directed the BBC to broadcast a evening statement about its conclusions.
"As this represents a significant violation of our rules, we are instructing the broadcaster to transmit a announcement of our findings against it on BBC2 at nine o'clock in the evening, with a date to be confirmed," it said.
'Potential to Undermine Credibility'
The authority's announcement declared: "The inquiry we conducted found that the documentary's lack of disclosure that the voice's parent served in a position in the Hamas-administered government was significantly deceptive.
"It meant that the public did not have critical information which may have been very significant to their evaluation of the presenter and the information he provided.
"Trust is at the core of the relationship between a media organization and its viewers, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This error had the risk to undermine the very considerable levels of confidence that audiences would have invested in a documentary produced by the BBC about the conflict in Gaza."
The film was withdrawn from the BBC's streaming service in last February after the boy's personal associations came to light, and in the month of July an internal BBC review concluded it violated the broadcaster's editorial guidelines on truthfulness.
A representative for the broadcaster said: "The regulator's decision is in agreement with the findings of the internal assessment, that there was a significant failing in the film in relation to the BBC's Editorial Guidelines on accuracy, which corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we comply with the authority's determination in complete. We will follow the penalty as soon as the timing and wording are confirmed."
