The public service broadcaster was found to have committed a "significant breach" of industry standards by not revealing that the presenter of a film about the Gaza conflict was the offspring of a Hamas official, according to UK media regulator Ofcom.
An inquiry by Ofcom into the programme 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 serious error in relation to truthfulness".
The regulator has ordered the broadcaster to air a evening statement about its conclusions.
"As this represents a major infringement of our regulations, we are directing the corporation to transmit a statement of our findings against it on BBC2 at 21:00, with a date to be determined," the statement read.
'Possibility to Erode Trust'
The watchdog's statement stated: "The inquiry we conducted determined that the film's failure to disclose that the narrator's male guardian occupied a position in the Hamas-controlled administration was substantially inaccurate.
"Consequently that the viewers did not have critical information which may have been highly relevant to their assessment of the narrator and the details he shared.
"Credibility is at the core of the connection between a broadcaster and its public, notably for a public service broadcaster such as the British Broadcasting Corporation.
"This failing had the risk to undermine the very considerable levels of trust that the public would have put in a BBC factual programme about the Gaza conflict."
The programme was pulled from the online platform in the month of February after the presenter's familial connections were revealed, and in this past July an internal BBC review concluded it breached the organization's content policies on truthfulness.
A representative for the broadcaster stated: "The Ofcom ruling is in accordance with the results of Peter Johnston's review, that there was a serious error in the film in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with Rule 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we agree with the regulator's ruling in its entirety. We will comply with the penalty as soon as the schedule and wording are finalised."
