The British broadcaster engaged in a "significant breach" of industry standards by omitting to mention that the presenter of a film about the Gaza situation was the offspring of a Hamas representative, as determined by regulatory body Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the programme was "significantly deceptive".
The BBC's director general had already issued an apology, saying there had been "a serious error in relation to accuracy".
The authority has instructed the corporation to air a evening statement about its decisions.
"Since this amounts to a significant violation of our regulations, we are ordering the BBC to broadcast a announcement of our findings against it on BBC2 at nine o'clock in the evening, with a schedule to be confirmed," the regulator stated.
'Risk to Damage Credibility'
The regulator's report declared: "Our investigation determined that the documentary's omission to reveal that the narrator's father held a role in the Hamas-administered administration was significantly deceptive.
"It meant that the viewers did not have vital facts which may have been very significant to their assessment of the presenter and the information he provided.
"Credibility is at the heart of the connection between a television network and its public, particularly for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the possibility to erode the exceptionally strong levels of confidence that the public would have placed in a documentary produced by the BBC about the Israel-Gaza war."
The film was removed from the online platform in February after the presenter's familial connections emerged, and in the month of July an corporation's own inquiry concluded it infringed the corporation's journalistic standards on factual correctness.
A corporation official said: "The regulator's decision is in accordance with the findings of Peter Johnston's review, that there was a major oversight in the programme in relation to the corporation's content standards on accuracy, which aligns with Rule 2.2 of the regulator's media standards.
"We issued an apology for this and we accept Ofcom's decision in complete. We will follow the sanction as soon as the date and language are determined."