The public service broadcaster committed a "serious breach" of media regulations by not revealing that the narrator of a documentary about the Gaza situation was the child of a Hamas representative, as determined by British broadcasting authority Ofcom.
An inquiry by Ofcom into Gaza: How to Survive a Warzone has determined that the film was "substantially inaccurate".
The BBC's director general had previously apologised, saying there had been "a major oversight in relation to factual correctness".
The authority has ordered the BBC to broadcast a evening declaration about its decisions.
"Since this amounts to a serious breach of our rules, we are ordering the BBC to broadcast a message of our findings against it on BBC Two at 21:00, with a date to be determined," it said.
'Risk to Damage Confidence'
The watchdog's announcement stated: "The inquiry we conducted found that the programme's failure to disclose that the voice's father served in a post in the Hamas-run administration was significantly deceptive.
"Consequently that the audience did not have vital facts which may have been extremely pertinent to their judgment of the presenter and the content he provided.
"Trust is at the core of the connection between a television network and its viewers, notably for a national broadcasting corporation such as the BBC.
"This failing had the potential to erode the exceptionally strong levels of trust that viewers would have placed in a factual film from the broadcaster about the conflict in Gaza."
The programme was removed from iPlayer in last February after the boy's personal associations emerged, and in this past July an broadcaster's internal assessment found it breached the organization's content policies on factual correctness.
A BBC spokesperson stated: "The regulator's decision is in accordance with the results of Peter Johnston's review, that there was a major oversight in the documentary in relation to the BBC's Editorial Guidelines on truthfulness, which corresponds to regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we comply with the regulator's ruling in its entirety. We will comply with the directive as soon as the date and wording are finalised."
