The British broadcaster committed a "serious breach" of broadcasting rules by omitting to mention that the presenter 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 documentary titled Gaza: How to Survive a Warzone has concluded that the film was "substantially inaccurate".
The BBC's director general had already issued an apology, noting there had been "a significant failing in relation to factual correctness".
Ofcom has directed the BBC to air a peak-time announcement about its decisions.
"Given this constitutes a serious breach of our code, we are instructing the corporation to transmit a message of our conclusions against it on the BBC's second channel at 21:00, with a date to be finalised," the statement read.
'Potential to Damage Credibility'
The watchdog's statement stated: "Our investigation concluded that the documentary's lack of disclosure that the voice's father held a position in the Hamas-controlled administration was substantially inaccurate.
"This implied that the public did not have essential details which may have been extremely pertinent to their judgment of the narrator and the content he presented.
"Trust is at the core of the bond between a broadcaster and its public, notably for a public service broadcaster such as the British Broadcasting Corporation.
"This oversight had the possibility to erode the very considerable degrees of trust that audiences would have put in a factual film from the broadcaster about the conflict in Gaza."
The documentary was withdrawn from the online platform in the month of February after the boy's personal associations came to light, and in July an internal BBC review determined it violated the organization's content policies on accuracy.
A representative for the broadcaster said: "The regulator's decision is in line with the results of the internal assessment, that there was a significant failing in the film in relation to the corporation's content standards on factual correctness, which reflects Rule 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we accept Ofcom's decision in its entirety. We will adhere to the sanction as soon as the timing and wording are confirmed."
