The British broadcaster committed a "major breach" of industry standards by not revealing that the narrator of a programme about Gaza was the child of a Hamas administrator, as ruled by regulatory body Ofcom.
An inquiry by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has determined that the film was "substantially inaccurate".
The BBC's director general had already issued an apology, noting there had been "a major oversight in relation to truthfulness".
Ofcom has directed the corporation to broadcast a prime-time declaration about its decisions.
"Given this constitutes a major infringement of our regulations, we are ordering the corporation to broadcast a statement of our findings against it on BBC2 at nine o'clock in the evening, with a schedule to be confirmed," the statement read.
'Potential to Damage Confidence'
The regulator's report stated: "The inquiry we conducted concluded that the programme's lack of disclosure that the voice's father held a role in the Hamas-controlled government was substantially inaccurate.
"It meant that the viewers did not have vital facts which may have been extremely pertinent to their assessment of the narrator and the information he provided.
"Trust is at the heart of the bond between a television network and its public, particularly for a state-funded media outlet such as the BBC.
"This error had the potential to erode the very considerable degrees of credibility that the public would have put in a factual film from the broadcaster about the conflict in Gaza."
The documentary was withdrawn from iPlayer in February after the presenter's family links were revealed, and in this past July an corporation's own inquiry determined it breached the corporation's journalistic standards on truthfulness.
A BBC spokesperson stated: "The regulator's decision is in agreement with the conclusions of the internal assessment, that there was a serious error in the film in relation to the broadcaster's journalistic policies on truthfulness, which aligns with clause 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we accept the authority's determination in complete. We will adhere to the penalty as soon as the date and wording are confirmed."
