The BBC committed a "significant breach" of media regulations by omitting to mention that the presenter of a programme about the Gaza situation was the son of a Hamas official, as determined by UK media regulator Ofcom.
An investigation by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The head of the BBC had earlier expressed regret, saying there had been "a serious error in relation to accuracy".
The authority has directed the BBC to transmit a evening statement about its findings.
"As this represents a serious breach of our code, we are ordering the broadcaster to air a statement of our determinations against it on the BBC's second channel at 9pm, with a date to be confirmed," it said.
'Potential to Undermine Credibility'
The authority's report said: "Our investigation concluded that the programme's failure to disclose that the voice's male guardian occupied a position in the Hamas-run administration was significantly deceptive.
"It meant that the public did not have critical information which may have been extremely pertinent to their evaluation of the narrator and the information he provided.
"Confidence is at the core of the bond between a media organization and its audience, particularly for a state-funded media outlet such as the public broadcaster.
"This error had the risk to damage the very considerable levels of confidence that viewers would have invested in a BBC factual programme about the Gaza conflict."
The film was removed from the BBC's streaming service in last February after the narrator's personal associations emerged, and in the month of July an internal BBC review determined it violated the organization's journalistic standards on accuracy.
A BBC spokesperson stated: "The authority's determination is in agreement with the findings of the corporation's inquiry, that there was a serious error in the programme in relation to the broadcaster's journalistic policies on truthfulness, which aligns with regulation 2.2 of the regulator's media standards.
"We have apologised for this and we agree with the authority's determination in its entirety. We will adhere to the sanction as soon as the timing and wording are determined."
