The public service broadcaster was found to have committed a "major breach" of industry standards by omitting to mention that the narrator of a film about Gaza was the child of a Hamas administrator, according to UK media regulator Ofcom.
An investigation by Ofcom into the documentary titled Gaza: How to Survive a Warzone has found that the documentary was "substantially inaccurate".
The chief executive of the broadcaster had already issued an apology, noting there had been "a serious error in relation to factual correctness".
The regulator has instructed the broadcaster to broadcast a evening declaration about its conclusions.
"Given this constitutes a significant violation of our rules, we are instructing the broadcaster to transmit a message of our findings against it on BBC2 at 9pm, with a schedule to be finalised," the statement read.
'Potential to Damage Confidence'
The authority's report stated: "The inquiry we conducted concluded that the film's omission to reveal that the voice's male guardian occupied a position in the Hamas-administered authority was materially misleading.
"This implied that the audience did not have vital facts which may have been highly relevant to their evaluation of the presenter and the information he shared.
"Confidence is at the center of the bond between a media organization and its public, particularly for a public service broadcaster such as the BBC.
"This failing had the possibility to erode the exceptionally strong degrees of trust that the public would have put in a documentary produced by the BBC about the conflict in Gaza."
The programme was withdrawn from iPlayer in February after the boy's personal associations came to light, and in the month of July an corporation's own inquiry determined it violated the broadcaster's journalistic standards on factual correctness.
A representative for the broadcaster said: "The Ofcom ruling is in agreement with the conclusions of Peter Johnston's review, that there was a significant failing in the film in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with clause 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we agree with the authority's determination in its entirety. We will comply with the sanction as soon as the schedule and wording are determined."
