The BBC committed a "major breach" of industry standards by failing to disclose that the voice of a documentary about the Gaza conflict was the son of a Hamas official, as ruled by UK media regulator Ofcom.
An investigation by Ofcom into the programme Gaza: How to Survive a Warzone has found that the film was "materially misleading".
The BBC's director general had previously apologised, saying there had been "a major oversight in relation to factual correctness".
Ofcom has directed the corporation to transmit a evening statement about its decisions.
"As this represents a serious breach of our rules, we are directing the broadcaster to broadcast a statement of our determinations against it on BBC2 at 21:00, with a timing to be determined," the regulator stated.
'Potential to Damage Credibility'
The regulator's announcement stated: "The inquiry we conducted concluded that the programme's failure to disclose that the narrator's parent held a position in the Hamas-controlled government was significantly deceptive.
"Consequently that the viewers did not have essential details which may have been extremely pertinent to their assessment of the voice and the information he presented.
"Confidence is at the center of the relationship between a television network and its viewers, notably for a state-funded media outlet such as the public broadcaster.
"This error had the possibility to damage the exceptionally strong degrees of confidence that the public would have invested in a factual film from the broadcaster about the Gaza conflict."
The documentary was withdrawn from the online platform in last February after the narrator's family links came to light, and in July an broadcaster's internal assessment found it breached the broadcaster's content policies on factual correctness.
A representative for the broadcaster said: "The regulator's decision is in accordance with the conclusions of the corporation's inquiry, that there was a major oversight in the film in relation to the BBC's Editorial Guidelines on truthfulness, which reflects clause 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with the authority's determination in its entirety. We will comply with the penalty as soon as the schedule and wording are finalised."
