The public service broadcaster engaged in a "serious breach" of broadcasting rules by omitting to mention that the presenter of a documentary about the Gaza conflict was the offspring of a Hamas representative, as ruled by British broadcasting authority Ofcom.
An inquiry by Ofcom into the documentary titled Gaza: How to Survive a Warzone has concluded that the film was "substantially inaccurate".
The BBC's director general had already issued an apology, stating there had been "a serious error in relation to accuracy".
The authority has ordered the BBC to air a evening statement about its decisions.
"Given this constitutes a significant violation of our rules, we are ordering the corporation to broadcast a statement of our determinations against it on the BBC's second channel at 21:00, with a timing to be determined," it said.
'Risk to Undermine Credibility'
The watchdog's announcement stated: "The inquiry we conducted found that the film's omission to reveal that the presenter's parent occupied a role in the Hamas-run administration was substantially inaccurate.
"This implied that the viewers did not have critical information which may have been highly relevant to their evaluation of the voice and the content he provided.
"Trust is at the center of the bond between a broadcaster and its public, notably for a national broadcasting corporation such as the BBC.
"This oversight had the possibility to undermine the significantly high amounts of confidence that audiences would have placed in a BBC factual programme about the Israel-Gaza war."
The documentary was pulled from the BBC's streaming service in the month of February after the narrator's personal associations came to light, and in July an corporation's own inquiry found it violated the corporation's content policies on factual correctness.
A BBC spokesperson said: "The Ofcom ruling is in line with the results of the corporation's inquiry, that there was a major oversight in the film in relation to the broadcaster's journalistic policies on factual correctness, which aligns with regulation 2.2 of the regulator's media standards.
"We have apologised for this and we comply with Ofcom's decision in full. We will comply with the penalty as soon as the date and wording are determined."
