The British broadcaster engaged in a "serious breach" of broadcasting rules by omitting to mention that the voice of a film about the Gaza conflict was the son of a Hamas representative, as ruled by regulatory body Ofcom.
An inquiry by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the programme was "materially misleading".
The head of the BBC had already issued an apology, stating there had been "a significant failing in relation to accuracy".
The regulator has ordered the broadcaster to air a peak-time statement about its findings.
"Since this amounts to a significant violation of our regulations, we are ordering the BBC to broadcast a announcement of our conclusions against it on BBC Two at nine o'clock in the evening, with a date to be confirmed," the regulator stated.
'Possibility to Erode Trust'
The watchdog's report said: "Our investigation found that the programme's omission to reveal that the voice's father served in a position in the Hamas-run government was materially misleading.
"It meant that the viewers did not have vital facts which may have been highly relevant to their evaluation of the voice and the details he provided.
"Trust is at the heart of the bond between a media organization and its viewers, notably for a public service broadcaster such as the BBC.
"This oversight had the risk to undermine the exceptionally strong levels of trust that viewers would have put in a documentary produced by the BBC about the Gaza conflict."
The documentary was removed from iPlayer in February after the presenter's family links were revealed, and in the month of July an corporation's own inquiry concluded it breached the broadcaster's journalistic standards on truthfulness.
A BBC spokesperson commented: "The authority's determination is in line with the results of the internal assessment, that there was a significant failing in the programme in relation to the corporation's content standards on factual correctness, which corresponds to Rule 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we comply with Ofcom's decision in complete. We will comply with the penalty as soon as the date and wording are determined."
