The BBC committed a "major breach" of industry standards by not revealing that the presenter of a programme about the Gaza conflict was the child of a Hamas representative, according to UK media regulator Ofcom.
An probe by Ofcom into Gaza: How to Survive a Warzone has found that the programme was "significantly deceptive".
The BBC's director general had already issued an apology, noting there had been "a major oversight in relation to accuracy".
Ofcom has ordered the broadcaster to air a evening statement about its findings.
"Given this constitutes a significant violation of our rules, we are ordering the BBC to air a statement of our determinations against it on BBC Two at 21:00, with a schedule to be confirmed," the regulator stated.
'Risk to Erode Credibility'
The regulator's report stated: "The inquiry we conducted determined that the documentary's failure to disclose that the narrator's male guardian occupied a role in the Hamas-administered administration was significantly deceptive.
"This implied that the viewers did not have critical information which may have been extremely pertinent to their judgment of the narrator and the content he shared.
"Confidence is at the core of the relationship between a broadcaster and its viewers, especially for a state-funded media outlet such as the BBC.
"This oversight had the possibility to undermine the exceptionally strong levels of confidence that viewers would have invested in a factual film from the broadcaster about the conflict in Gaza."
The documentary was removed from iPlayer in the month of February after the boy's family links emerged, and in the month of July an internal BBC review concluded it breached the corporation's content policies on accuracy.
A corporation official stated: "The regulator's decision is in line with the results of the internal assessment, that there was a significant failing in the programme in relation to the BBC's Editorial Guidelines on factual correctness, which reflects regulation 2.2 of the regulator's media standards.
"We expressed regret for this and we comply with the authority's determination in its entirety. We will follow the directive as soon as the date and wording are finalised."
