The British broadcaster committed a "major breach" of industry standards by failing to disclose that the voice of a programme about the Gaza conflict was the offspring of a Hamas administrator, as ruled by UK media regulator Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has determined that the documentary was "significantly deceptive".
The BBC's director general had previously apologised, stating there had been "a significant failing in relation to factual correctness".
Ofcom has instructed the broadcaster to transmit a evening declaration about its findings.
"Since this amounts to a significant violation of our rules, we are ordering the broadcaster to air a announcement of our determinations against it on BBC2 at 21:00, with a schedule to be confirmed," the statement read.
'Possibility to Erode Trust'
The authority's announcement stated: "The inquiry we conducted determined that the programme's lack of disclosure that the presenter's parent held a post in the Hamas-controlled administration was significantly deceptive.
"Consequently that the audience did not have critical information which may have been highly relevant to their judgment of the presenter and the content he shared.
"Trust is at the center of the relationship between a television network and its viewers, notably for a public service broadcaster such as the public broadcaster.
"This error had the possibility to undermine the significantly high amounts of trust that audiences would have placed in a factual film from the broadcaster about the Israel-Gaza war."
The programme was pulled from the online platform in February after the presenter's family links emerged, and in the month of July an corporation's own inquiry found it violated the organization's journalistic standards on accuracy.
A BBC spokesperson said: "The Ofcom ruling is in line with the findings of Peter Johnston's review, that there was a major oversight in the programme in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to clause 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we comply with the authority's determination in full. We will comply with the penalty as soon as the date and language are determined."
