The British broadcaster was found to have committed a "serious breach" of industry standards by omitting to mention that the presenter of a programme about the Gaza situation was the child of a Hamas official, as determined by UK media regulator Ofcom.
An inquiry by Ofcom into the programme Gaza: How to Survive a Warzone has found that the documentary was "materially misleading".
The head of the BBC had previously apologised, saying there had been "a serious error in relation to accuracy".
Ofcom has ordered the corporation to air a evening statement about its conclusions.
"Given this constitutes a major infringement of our regulations, we are instructing the corporation to air a message of our conclusions against it on BBC2 at 21:00, with a date to be confirmed," it said.
'Potential to Undermine Confidence'
The regulator's report declared: "Our probe found that the film's failure to disclose that the presenter's parent occupied a position in the Hamas-run authority was materially misleading.
"This implied that the public did not have critical information which may have been highly relevant to their evaluation of the narrator and the details he provided.
"Trust is at the heart of the bond between a television network and its audience, especially for a national broadcasting corporation such as the public broadcaster.
"This oversight had the risk to undermine the significantly high degrees of trust that audiences would have placed in a documentary produced by the BBC about the Gaza conflict."
The programme was removed from the online platform in February after the boy's family links emerged, and in July an internal BBC review determined it breached the organization's content policies on truthfulness.
A BBC spokesperson stated: "The regulator's decision is in accordance with the findings of Peter Johnston's review, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to regulation 2.2 of the regulator's media standards.
"We have apologised for this and we comply with Ofcom's decision in full. We will adhere to the penalty as soon as the schedule and wording are determined."
