The BBC committed a "major breach" of industry standards by not revealing that the presenter of a film about Gaza was the son of a Hamas administrator, as ruled by UK media regulator Ofcom.
An investigation by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has found that the programme was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, saying there had been "a serious error in relation to accuracy".
The regulator has ordered the BBC to transmit a prime-time statement about its conclusions.
"Given this constitutes a major infringement of our code, we are ordering the broadcaster to broadcast a announcement of our determinations against it on BBC2 at 9pm, with a date to be determined," the regulator stated.
'Possibility to Undermine Credibility'
The regulator's announcement stated: "Our investigation concluded that the programme's failure to disclose that the narrator's father held a position in the Hamas-administered government was significantly deceptive.
"Consequently that the audience did not have critical information which may have been highly relevant to their assessment of the narrator and the details he presented.
"Confidence is at the core of the bond between a broadcaster and its public, notably for a national broadcasting corporation such as the public broadcaster.
"This oversight had the risk to erode the significantly high degrees of credibility that audiences would have placed in a BBC factual programme about the Gaza conflict."
The documentary was removed from the BBC's streaming service in February after the boy's family links were revealed, and in July an broadcaster's internal assessment determined it violated the organization's content policies on truthfulness.
A corporation official commented: "The authority's determination is in agreement with the results of the internal assessment, that there was a major oversight in the programme in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with clause 2.2 of the regulator's media standards.
"We issued an apology for this and we accept the authority's determination in full. We will follow the sanction as soon as the timing and wording are determined."
