The public service broadcaster was found to have committed a "major breach" of media regulations by failing to disclose that the presenter of a programme about Gaza was the son of a Hamas official, as determined by UK media regulator Ofcom.
An investigation by Ofcom into Gaza: How to Survive a Warzone has concluded that the documentary was "substantially inaccurate".
The chief executive of the broadcaster had earlier expressed regret, stating there had been "a significant failing in relation to factual correctness".
The regulator has instructed the broadcaster to broadcast a evening declaration about its findings.
"Given this constitutes a major infringement of our rules, we are ordering the BBC to transmit a announcement of our determinations against it on the BBC's second channel at 9pm, with a date to be confirmed," the statement read.
'Possibility to Undermine Trust'
The watchdog's announcement said: "Our investigation determined that the film's failure to disclose that the voice's male guardian served in a post in the Hamas-administered authority was significantly deceptive.
"It meant that the audience did not have vital facts which may have been extremely pertinent to their evaluation of the voice and the content he presented.
"Trust is at the center of the bond between a media organization and its public, especially for a national broadcasting corporation such as the British Broadcasting Corporation.
"This oversight had the risk to erode the exceptionally strong levels of confidence that the public would have placed in a factual film from the broadcaster about the conflict in Gaza."
The documentary was removed from iPlayer in the month of February after the boy's familial connections were revealed, and in July an broadcaster's internal assessment found it breached the corporation's journalistic standards on accuracy.
A BBC spokesperson said: "The Ofcom ruling is in agreement with the results of Peter Johnston's review, that there was a serious error in the documentary in relation to the broadcaster's journalistic policies on accuracy, which aligns with Rule 2.2 of the regulator's media standards.
"We expressed regret for this and we accept the authority's determination in its entirety. We will adhere to the sanction as soon as the date and wording are determined."
