The public service broadcaster engaged in a "major breach" of media regulations by not revealing that the presenter of a documentary about Gaza was the offspring of a Hamas representative, as ruled by British broadcasting authority Ofcom.
An probe by the media regulator into the programme Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The BBC's director general had previously apologised, stating there had been "a major oversight in relation to accuracy".
The authority has directed the broadcaster to air a prime-time statement about its findings.
"As this represents a serious breach of our code, we are directing the BBC to transmit a announcement of our findings against it on BBC Two at 21:00, with a schedule to be confirmed," the statement read.
'Risk to Erode Credibility'
The regulator's report stated: "Our probe determined that the programme's lack of disclosure that the narrator's parent occupied a position in the Hamas-controlled authority was significantly deceptive.
"It meant that the audience did not have vital facts which may have been highly relevant to their judgment of the narrator and the details he provided.
"Trust is at the heart of the connection between a media organization and its public, especially for a state-funded media outlet such as the BBC.
"This error had the risk to damage the very considerable degrees of trust that audiences would have invested in a BBC factual programme about the Gaza conflict."
The programme was pulled from the online platform in February after the boy's personal associations emerged, and in this past July an internal BBC review determined it violated the organization's editorial guidelines on factual correctness.
A representative for the broadcaster stated: "The Ofcom ruling is in line with the conclusions of the internal assessment, that there was a significant failing in the programme in relation to the BBC's Editorial Guidelines on factual correctness, which reflects regulation 2.2 of the regulator's media standards.
"We expressed regret for this and we agree with Ofcom's decision in full. We will adhere to the sanction as soon as the timing and wording are determined."
