The BBC was found to have committed a "serious breach" of media regulations by not revealing that the voice of a programme about Gaza was the child of a Hamas representative, according to UK media regulator Ofcom.
An investigation by the media regulator into the documentary titled Gaza: How to Survive a Warzone has determined that the programme was "materially misleading".
The BBC's director general had previously apologised, stating there had been "a significant failing in relation to factual correctness".
The authority has ordered the corporation to transmit a prime-time declaration about its findings.
"Given this constitutes a significant violation of our code, we are directing the broadcaster to air a message of our determinations against it on the BBC's second channel at 21:00, with a timing to be finalised," the statement read.
'Potential to Undermine Trust'
The authority's statement stated: "Our investigation found that the programme's omission to reveal that the narrator's parent served in a post in the Hamas-run administration was substantially inaccurate.
"It meant that the viewers did not have critical information which may have been very significant to their evaluation of the voice and the details he presented.
"Confidence is at the core of the bond between a media organization and its viewers, particularly for a public service broadcaster such as the BBC.
"This oversight had the risk to erode the exceptionally strong degrees of confidence that viewers would have placed in a BBC factual programme about the Gaza conflict."
The documentary was withdrawn from the online platform in the month of February after the presenter's personal associations came to light, and in this past July an broadcaster's internal assessment determined it breached the organization's content policies on truthfulness.
A representative for the broadcaster stated: "The regulator's decision is in agreement with the results of Peter Johnston's review, that there was a significant failing in the film in relation to the broadcaster's journalistic policies on factual correctness, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we agree with the authority's determination in its entirety. We will follow the penalty as soon as the timing and wording are confirmed."
