The BBC committed a "serious breach" of media regulations by failing to disclose that the voice of a documentary about the Gaza situation was the son of a Hamas representative, as determined by UK media regulator Ofcom.
An inquiry by Ofcom into the programme Gaza: How to Survive a Warzone has concluded that the programme was "materially misleading".
The head of the BBC had earlier expressed regret, noting there had been "a significant failing in relation to accuracy".
The authority has directed the corporation to air a evening announcement about its decisions.
"As this represents a significant violation of our rules, we are ordering the broadcaster to broadcast a statement of our findings against it on BBC2 at 21:00, with a schedule to be finalised," the regulator stated.
'Potential to Undermine Trust'
The regulator's announcement said: "Our investigation concluded that the programme's failure to disclose that the narrator's father occupied a role in the Hamas-run government was significantly deceptive.
"It meant that the viewers did not have vital facts which may have been very significant to their evaluation of the voice and the details he presented.
"Trust is at the core of the relationship between a broadcaster and its viewers, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the potential to undermine the very considerable amounts of trust that the public would have put in a BBC factual programme about the conflict in Gaza."
The documentary was removed from the BBC's streaming service in the month of February after the boy's familial connections were revealed, and in the month of July an corporation's own inquiry determined it violated the corporation's editorial guidelines on factual correctness.
A corporation official stated: "The Ofcom ruling is in line with the findings of the internal assessment, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on truthfulness, 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 follow the sanction as soon as the schedule and wording are confirmed."
