The BBC was found to have committed a "serious breach" of media regulations by omitting to mention that the narrator of a film about the Gaza situation was the child of a Hamas administrator, as determined by regulatory body Ofcom.
An inquiry by Ofcom into Gaza: How to Survive a Warzone has determined that the documentary was "substantially inaccurate".
The BBC's director general had earlier expressed regret, noting there had been "a major oversight in relation to truthfulness".
The authority has instructed the broadcaster to air a peak-time statement about its decisions.
"As this represents a major infringement of our rules, we are instructing the broadcaster to broadcast a message of our conclusions against it on the BBC's second channel at nine o'clock in the evening, with a schedule to be finalised," the statement read.
'Risk to Undermine Trust'
The authority's report said: "Our investigation determined that the film's omission to reveal that the voice's father held a role in the Hamas-run administration was materially misleading.
"This implied that the viewers did not have vital facts which may have been very significant to their evaluation of the presenter and the content he presented.
"Trust is at the heart of the relationship between a broadcaster and its public, particularly for a state-funded media outlet such as the BBC.
"This failing had the potential to undermine the exceptionally strong levels of trust that the public would have placed in a factual film from the broadcaster about the conflict in Gaza."
The film was removed from the online platform in the month of February after the boy's familial connections were revealed, and in July an broadcaster's internal assessment concluded it breached the corporation's content policies on accuracy.
A BBC spokesperson commented: "The regulator's decision is in agreement with the conclusions of Peter Johnston's review, that there was a significant failing in the programme in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with Rule 2.2 of the regulator's media standards.
"We issued an apology for this and we accept the regulator's ruling in full. We will comply with the directive as soon as the timing and language are determined."
