The British broadcaster engaged in a "serious breach" of industry standards by omitting to mention that the narrator of a programme about Gaza was the son of a Hamas official, as ruled by British broadcasting authority Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The head of the BBC had already issued an apology, saying there had been "a major oversight in relation to truthfulness".
The authority has instructed the corporation to broadcast a evening statement about its decisions.
"Since this amounts to a major infringement of our code, we are ordering the broadcaster to broadcast a announcement of our determinations against it on BBC2 at 21:00, with a timing to be determined," it said.
'Risk to Erode Confidence'
The authority's report stated: "Our probe concluded that the film's failure to disclose that the voice's parent served in a position in the Hamas-controlled government was materially misleading.
"This implied that the audience did not have vital facts which may have been highly relevant to their judgment of the narrator and the content he provided.
"Confidence is at the center of the bond between a television network and its public, especially for a public service broadcaster such as the British Broadcasting Corporation.
"This oversight had the potential to undermine the significantly high levels of credibility that viewers would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was removed from iPlayer in February after the boy's personal associations were revealed, and in July an broadcaster's internal assessment found it breached the organization's content policies on factual correctness.
A BBC spokesperson commented: "The Ofcom ruling is in agreement with the findings of the corporation's inquiry, that there was a serious error in the film in relation to the BBC's Editorial Guidelines on truthfulness, which corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with the authority's determination in complete. We will adhere to the penalty as soon as the schedule and language are finalised."
