The British broadcaster committed a "serious breach" of media regulations by not revealing that the voice of a film about the Gaza conflict was the offspring of a Hamas official, as determined by UK media regulator Ofcom.
An investigation by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the film was "materially misleading".
The head of the BBC had earlier expressed regret, noting there had been "a significant failing in relation to truthfulness".
Ofcom has directed the BBC to transmit a prime-time announcement about its decisions.
"Given this constitutes a major infringement of our regulations, we are ordering the corporation to broadcast a announcement of our conclusions against it on BBC Two at 21:00, with a date to be finalised," the statement read.
'Risk to Undermine Trust'
The watchdog's statement stated: "The inquiry we conducted found that the film's failure to disclose that the narrator's parent held a position in the Hamas-administered authority was substantially inaccurate.
"It meant that the audience did not have critical information which may have been highly relevant to their assessment of the narrator and the content he provided.
"Confidence is at the center of the bond between a broadcaster and its audience, especially for a public service broadcaster such as the public broadcaster.
"This failing had the possibility to erode the very considerable amounts of credibility that viewers would have placed in a factual film from the broadcaster about the Gaza conflict."
The documentary was pulled from iPlayer in February after the presenter's family links were revealed, and in July an corporation's own inquiry determined it violated the organization's editorial guidelines on factual correctness.
A BBC spokesperson said: "The regulator's decision is in line with the findings of Peter Johnston's review, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on accuracy, which corresponds to regulation 2.2 of the regulator's media standards.
"We expressed regret for this and we comply with the regulator's ruling in complete. We will follow the penalty as soon as the schedule and wording are finalised."
