The public service broadcaster engaged in a "major breach" of broadcasting rules by not revealing that the presenter of a documentary about the Gaza situation was the offspring of a Hamas representative, as ruled by UK media regulator Ofcom.
An probe by Ofcom into the documentary titled Gaza: How to Survive a Warzone has found that the documentary was "materially misleading".
The BBC's director general had earlier expressed regret, stating there had been "a major oversight in relation to accuracy".
Ofcom has ordered the broadcaster to air a evening announcement about its decisions.
"Given this constitutes a major infringement of our regulations, we are ordering the corporation to air a announcement of our conclusions against it on the BBC's second channel at 21:00, with a schedule to be confirmed," the regulator stated.
'Possibility to Undermine Credibility'
The authority's announcement stated: "Our probe found that the film's omission to reveal that the narrator's father held a role in the Hamas-administered authority was substantially inaccurate.
"Consequently that the public did not have essential details which may have been very significant to their assessment of the presenter and the content he provided.
"Trust is at the core of the connection between a broadcaster and its viewers, particularly for a public service broadcaster such as the British Broadcasting Corporation.
"This oversight had the possibility to damage the exceptionally strong degrees of credibility that audiences would have put in a documentary produced by the BBC about the conflict in Gaza."
The programme was removed from the online platform in last February after the boy's family links emerged, and in this past July an broadcaster's internal assessment determined it infringed the broadcaster's editorial guidelines on truthfulness.
A representative for the broadcaster stated: "The regulator's decision is in agreement with the results of the internal assessment, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which aligns with regulation 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we comply with the regulator's ruling in its entirety. We will adhere to the sanction as soon as the schedule and wording are determined."