The British broadcaster was found to have committed a "serious breach" of media regulations by not revealing that the presenter of a film about Gaza was the child of a Hamas administrator, as determined by regulatory body Ofcom.
An inquiry by Ofcom into the documentary titled Gaza: How to Survive a Warzone has found that the programme was "significantly deceptive".
The chief executive of the broadcaster had already issued an apology, noting there had been "a significant failing in relation to factual correctness".
Ofcom has instructed the broadcaster to air a peak-time announcement about its decisions.
"As this represents a major infringement of our rules, we are ordering the corporation to broadcast a message of our determinations against it on the BBC's second channel at 21:00, with a schedule to be determined," the regulator stated.
'Potential to Damage Trust'
The authority's statement declared: "The inquiry we conducted concluded that the film's failure to disclose that the voice's parent occupied a role in the Hamas-run authority was significantly deceptive.
"This implied that the viewers did not have critical information which may have been extremely pertinent to their evaluation of the narrator and the information he presented.
"Confidence is at the core of the bond between a broadcaster and its viewers, notably for a national broadcasting corporation such as the BBC.
"This oversight had the potential to undermine the very considerable levels of confidence that audiences would have invested in a BBC factual programme about the Gaza conflict."
The documentary was withdrawn from the BBC's streaming service in the month of February after the presenter's familial connections were revealed, and in July an corporation's own inquiry concluded it breached the broadcaster's content policies on truthfulness.
A representative for the broadcaster stated: "The regulator's decision is in line with the findings of Peter Johnston's review, that there was a significant failing in the documentary in relation to the broadcaster's journalistic policies on accuracy, which aligns with clause 2.2 of the regulator's media standards.
"We expressed regret for this and we accept Ofcom's decision in full. We will follow the sanction as soon as the schedule and language are finalised."
