The public service broadcaster committed a "major breach" of media regulations by not revealing that the voice of a programme about the Gaza situation was the offspring of a Hamas official, as determined by UK media regulator Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has determined that the programme was "substantially inaccurate".
The chief executive of the broadcaster had already issued an apology, stating there had been "a major oversight in relation to accuracy".
The authority has instructed the BBC to transmit a evening declaration about its decisions.
"Since this amounts to a significant violation of our rules, we are instructing the BBC to transmit a announcement of our conclusions against it on BBC2 at 21:00, with a schedule to be confirmed," the regulator stated.
'Possibility to Erode Credibility'
The authority's announcement declared: "The inquiry we conducted found that the film's lack of disclosure that the presenter's male guardian served in a post in the Hamas-run government was substantially inaccurate.
"This implied that the public did not have essential details which may have been extremely pertinent to their judgment of the presenter and the details he provided.
"Trust is at the heart of the relationship between a television network and its public, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This failing had the potential to damage the significantly high degrees of trust that audiences would have invested in a BBC factual programme about the Gaza conflict."
The programme was removed from the BBC's streaming service in February after the narrator's familial connections emerged, and in this past July an corporation's own inquiry determined it violated the broadcaster's editorial guidelines on accuracy.
A BBC spokesperson stated: "The Ofcom ruling is in agreement with the findings of the internal assessment, that there was a major oversight in the programme in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to Rule 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we comply with the regulator's ruling in its entirety. We will comply with the directive as soon as the schedule and wording are confirmed."