The BBC committed a "serious breach" of media regulations by omitting to mention that the narrator of a film about the Gaza conflict was the offspring of a Hamas representative, as ruled by UK media regulator Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has concluded that the documentary was "substantially inaccurate".
The BBC's director general had previously apologised, noting there had been "a serious error in relation to truthfulness".
Ofcom has instructed the corporation to air a peak-time declaration about its decisions.
"Given this constitutes a serious breach of our regulations, we are instructing the broadcaster to transmit a message of our conclusions against it on BBC Two at 9pm, with a schedule to be finalised," the regulator stated.
'Possibility to Erode Trust'
The regulator's statement stated: "The inquiry we conducted concluded that the documentary's lack of disclosure that the voice's parent occupied a post in the Hamas-administered administration was substantially inaccurate.
"It meant that the public did not have vital facts which may have been highly relevant to their evaluation of the presenter and the information he presented.
"Confidence is at the heart of the connection between a television network and its viewers, particularly for a public service broadcaster such as the public broadcaster.
"This oversight had the possibility to undermine the exceptionally strong levels of trust that viewers would have placed in a factual film from the broadcaster about the Gaza conflict."
The programme was removed from the online platform in last February after the boy's personal associations came to light, and in this past July an internal BBC review found it breached the organization's content policies on accuracy.
A BBC spokesperson said: "The Ofcom ruling is in accordance with the findings of the internal assessment, that there was a major oversight in the documentary in relation to the BBC's Editorial Guidelines on factual correctness, which corresponds to regulation 2.2 of the regulator's media standards.
"We issued an apology for this and we accept the authority's determination in full. We will comply with the sanction as soon as the schedule and wording are confirmed."
