The British broadcaster engaged in a "significant breach" of broadcasting rules by omitting to mention that the voice of a programme about the Gaza situation was the child of a Hamas administrator, as determined by UK media regulator Ofcom.
An investigation by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has determined that the programme was "significantly deceptive".
The head of the BBC had earlier expressed regret, saying there had been "a major oversight in relation to accuracy".
Ofcom has instructed the BBC to transmit a prime-time statement about its decisions.
"Given this constitutes a serious breach of our code, we are ordering the BBC to air a statement of our conclusions against it on BBC2 at 21:00, with a timing to be confirmed," the statement read.
'Potential to Erode Credibility'
The regulator's announcement stated: "The inquiry we conducted concluded that the programme's lack of disclosure that the presenter's parent held a position in the Hamas-administered authority was significantly deceptive.
"This implied that the viewers did not have vital facts which may have been extremely pertinent to their evaluation of the presenter and the details he presented.
"Trust is at the heart of the relationship between a broadcaster and its audience, particularly for a national broadcasting corporation such as the public broadcaster.
"This oversight had the risk to erode the significantly high levels of confidence that viewers would have invested in a BBC factual programme about the conflict in Gaza."
The documentary was pulled from the BBC's streaming service in the month of February after the presenter's familial connections were revealed, and in the month of July an corporation's own inquiry found it breached the broadcaster's editorial guidelines on truthfulness.
A corporation official stated: "The Ofcom ruling is in agreement with the results of Peter Johnston's review, that there was a major oversight in the documentary in relation to the corporation's content standards on accuracy, which reflects Rule 2.2 of the regulator's media standards.
"We issued an apology for this and we agree with the regulator's ruling in full. We will comply with the penalty as soon as the schedule and wording are finalised."
