The BBC was found to have committed a "major breach" of industry standards by failing to disclose that the presenter of a film about Gaza was the child of a Hamas official, as determined by UK media regulator Ofcom.
An inquiry by Ofcom into Gaza: How to Survive a Warzone has determined 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 factual correctness".
Ofcom has directed the corporation to broadcast a peak-time announcement about its conclusions.
"Given this constitutes a significant violation of our rules, we are ordering the corporation to broadcast a message of our conclusions against it on the BBC's second channel at 9pm, with a schedule to be finalised," the statement read.
'Possibility to Erode Credibility'
The watchdog's report declared: "Our probe found that the documentary's failure to disclose that the voice's father held a post in the Hamas-controlled government was substantially inaccurate.
"This implied that the public did not have essential details which may have been very significant to their evaluation of the presenter and the information he shared.
"Trust is at the core of the connection between a television network and its audience, especially for a public service broadcaster such as the British Broadcasting Corporation.
"This failing had the possibility to erode the significantly high amounts of credibility that the public would have placed in a documentary produced by the BBC about the Israel-Gaza war."
The programme was pulled from iPlayer in the month of February after the narrator's family links emerged, and in this past July an broadcaster's internal assessment determined it violated the broadcaster's content policies on truthfulness.
A corporation official stated: "The authority's determination is in agreement with the results of the internal assessment, that there was a serious error in the documentary in relation to the broadcaster's journalistic policies on accuracy, which reflects clause 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we accept the authority's determination in complete. We will adhere to the penalty as soon as the schedule and wording are determined."
