The British broadcaster committed a "serious breach" of industry standards by not revealing that the narrator of a programme about the Gaza conflict was the offspring of a Hamas administrator, as ruled by British broadcasting authority Ofcom.
An investigation by Ofcom into Gaza: How to Survive a Warzone has found that the film was "significantly deceptive".
The BBC's director general had previously apologised, stating there had been "a serious error in relation to truthfulness".
The authority has instructed the corporation to transmit a evening declaration about its decisions.
"Given this constitutes a serious breach of our rules, we are instructing the broadcaster to transmit a announcement of our determinations against it on the BBC's second channel at 21:00, with a schedule to be confirmed," it said.
'Possibility to Undermine Trust'
The watchdog's report stated: "The inquiry we conducted found that the film's failure to disclose that the voice's father occupied a post in the Hamas-administered authority was substantially inaccurate.
"This implied that the public did not have vital facts which may have been extremely pertinent to their judgment of the narrator and the information he provided.
"Trust is at the center of the connection between a broadcaster and its public, notably for a national broadcasting corporation such as the BBC.
"This failing had the potential to damage the exceptionally strong amounts of trust that viewers would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The film was withdrawn from the online platform in last February after the boy's familial connections came to light, and in this past July an broadcaster's internal assessment concluded it violated the organization's content policies on accuracy.
A corporation official stated: "The authority's determination is in agreement with the results of the corporation's inquiry, that there was a serious error in the documentary in relation to the BBC's Editorial Guidelines on truthfulness, which corresponds to clause 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we agree with Ofcom's decision in its entirety. We will comply with the directive as soon as the timing and wording are determined."
