The BBC engaged in a "serious breach" of industry standards by not revealing that the voice of a programme about the Gaza conflict was the child of a Hamas official, as determined by British broadcasting authority Ofcom.
An inquiry by Ofcom into the documentary titled Gaza: How to Survive a Warzone has determined that the programme was "significantly deceptive".
The head of the BBC had already issued an apology, stating there had been "a serious error in relation to truthfulness".
The regulator has ordered the broadcaster to air a peak-time announcement about its findings.
"Given this constitutes a significant violation of our code, we are ordering the BBC to air a statement of our conclusions against it on BBC2 at 21:00, with a date to be determined," the statement read.
'Potential to Undermine Confidence'
The regulator's report declared: "Our investigation concluded that the programme's lack of disclosure that the voice's parent held a position in the Hamas-controlled administration was significantly deceptive.
"This implied that the audience did not have essential details which may have been extremely pertinent to their evaluation of the presenter and the details he presented.
"Confidence is at the core of the bond between a broadcaster and its public, particularly for a state-funded media outlet such as the BBC.
"This oversight had the potential to undermine the exceptionally strong degrees of credibility that viewers would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The film was withdrawn from iPlayer in the month of February after the narrator's personal associations came to light, and in this past July an broadcaster's internal assessment determined it breached the corporation's journalistic standards on truthfulness.
A BBC spokesperson stated: "The Ofcom ruling is in agreement with the conclusions of the internal assessment, that there was a major oversight in the film in relation to the corporation's content standards on factual correctness, which reflects Rule 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we comply with the regulator's ruling in complete. We will adhere to the sanction as soon as the date and wording are finalised."
