The BBC engaged in a "serious breach" of industry standards by omitting to mention that the voice of a documentary about Gaza was the child of a Hamas representative, as ruled by regulatory body Ofcom.
An investigation by the media regulator into Gaza: How to Survive a Warzone has determined that the documentary was "significantly deceptive".
The head of the BBC had previously apologised, noting there had been "a major oversight in relation to accuracy".
The regulator has directed the BBC to broadcast a evening statement about its decisions.
"As this represents a serious breach of our rules, we are ordering the corporation to transmit a announcement of our conclusions against it on the BBC's second channel at 9pm, with a date to be finalised," the statement read.
'Possibility to Undermine Credibility'
The watchdog's report stated: "Our probe determined that the programme's lack of disclosure that the narrator's parent served in a role in the Hamas-controlled administration was substantially inaccurate.
"It meant that the viewers did not have essential details which may have been extremely pertinent to their evaluation of the presenter and the content he shared.
"Confidence is at the core of the bond between a television network and its viewers, particularly for a public service broadcaster such as the British Broadcasting Corporation.
"This oversight had the risk to damage the very considerable degrees of credibility that audiences would have placed in a BBC factual programme about the conflict in Gaza."
The film was removed from the online platform in the month of February after the narrator's familial connections were revealed, and in this past July an internal BBC review found it violated the broadcaster's editorial guidelines on accuracy.
A representative for the broadcaster stated: "The Ofcom ruling is in accordance with the results of Peter Johnston's review, that there was a serious error in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to Rule 2.2 of the regulator's media standards.
"We issued an apology for this and we accept the authority's determination in its entirety. We will adhere to the directive as soon as the schedule and wording are determined."
