The public service broadcaster was found to have committed a "major breach" of media regulations by omitting to mention that the narrator of a film about the Gaza conflict was the child of a Hamas administrator, as determined by British broadcasting authority Ofcom.
An investigation by Ofcom into the documentary titled Gaza: How to Survive a Warzone has found that the documentary was "substantially inaccurate".
The head of the BBC had already issued an apology, noting there had been "a serious error in relation to factual correctness".
Ofcom has instructed the broadcaster to air a prime-time declaration about its findings.
"As this represents a significant violation of our rules, we are instructing the BBC to broadcast a statement of our conclusions against it on BBC Two at nine o'clock in the evening, with a schedule to be determined," the regulator stated.
'Potential to Erode Confidence'
The watchdog's announcement declared: "Our investigation found that the programme's lack of disclosure that the presenter's parent held a position in the Hamas-run administration was materially misleading.
"Consequently that the public did not have essential details which may have been very significant to their evaluation of the presenter and the content he provided.
"Trust is at the heart of the bond between a television network and its public, especially for a national broadcasting corporation such as the British Broadcasting Corporation.
"This failing had the potential to undermine the significantly high levels of trust that the public would have placed in a BBC factual programme about the conflict in Gaza."
The documentary was pulled from the BBC's streaming service in February after the boy's family links emerged, and in the month of July an corporation's own inquiry determined it breached the broadcaster's journalistic standards on truthfulness.
A representative for the broadcaster said: "The regulator's decision is in agreement with the findings of the corporation's inquiry, that there was a serious error in the programme in relation to the broadcaster's journalistic policies on factual correctness, which aligns with clause 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 schedule and wording are finalised."
