The BBC committed a "major breach" of broadcasting rules by omitting to mention that the narrator of a documentary about Gaza was the child of a Hamas official, as determined by regulatory body Ofcom.
An probe by Ofcom into Gaza: How to Survive a Warzone has concluded that the programme was "materially misleading".
The BBC's director general had already issued an apology, noting there had been "a major oversight in relation to truthfulness".
The regulator has directed the corporation to transmit a evening statement about its decisions.
"As this represents a major infringement of our code, we are ordering the corporation to air a statement of our conclusions against it on the BBC's second channel at nine o'clock in the evening, with a schedule to be determined," the statement read.
'Possibility to Erode Trust'
The regulator's report declared: "The inquiry we conducted determined that the film's omission to reveal that the voice's male guardian occupied a role in the Hamas-run authority was materially misleading.
"Consequently that the public did not have vital facts which may have been highly relevant to their evaluation of the presenter and the information he shared.
"Trust is at the center of the relationship between a television network and its public, particularly for a public service broadcaster such as the BBC.
"This failing had the potential to undermine the exceptionally strong degrees of trust that viewers would have invested in a documentary produced by the BBC about the conflict in Gaza."
The film was withdrawn from the online platform in last February after the boy's familial connections came to light, and in July an broadcaster's internal assessment concluded it infringed the organization's content policies on accuracy.
A representative for the broadcaster said: "The Ofcom ruling is in line with the findings of the corporation's inquiry, that there was a significant failing 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 expressed regret for this and we accept Ofcom's decision in complete. We will comply with the sanction as soon as the schedule and language are finalised."
