The BBC was found to have committed a "significant breach" of media regulations by failing to disclose that the voice of a programme about Gaza was the offspring of a Hamas official, according to British broadcasting authority Ofcom.
An inquiry by Ofcom into Gaza: How to Survive a Warzone has determined that the film was "materially misleading".
The BBC's director general had earlier expressed regret, stating there had been "a major oversight in relation to truthfulness".
The authority has directed the broadcaster to transmit a peak-time announcement about its conclusions.
"As this represents a serious breach of our code, we are ordering the corporation to broadcast a message of our findings against it on BBC2 at 9pm, with a schedule to be finalised," it said.
'Risk to Undermine Credibility'
The authority's report said: "Our investigation concluded that the film's omission to reveal that the voice's parent occupied a role in the Hamas-controlled administration was materially misleading.
"Consequently that the viewers did not have essential details which may have been extremely pertinent to their evaluation of the presenter and the details he provided.
"Credibility is at the core of the relationship between a television network and its viewers, notably for a national broadcasting corporation such as the public broadcaster.
"This oversight had the possibility to undermine the exceptionally strong levels of trust that the public would have put in a documentary produced by the BBC about the Israel-Gaza war."
The programme was pulled from the online platform in the month of February after the boy's personal associations came to light, and in the month of July an broadcaster's internal assessment concluded it breached the corporation's journalistic standards on truthfulness.
A corporation official commented: "The Ofcom ruling is in accordance with the results of the internal assessment, that there was a serious error in the programme in relation to the BBC's Editorial Guidelines on accuracy, which reflects clause 2.2 of the regulator's media standards.
"We expressed regret for this and we comply with Ofcom's decision in its entirety. We will adhere to the directive as soon as the schedule and wording are determined."
