The BBC engaged in a "serious breach" of industry standards by failing to disclose that the narrator of a programme about the Gaza conflict was the offspring of a Hamas representative, as determined by UK media regulator Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the documentary was "significantly deceptive".
The head of the BBC had earlier expressed regret, noting there had been "a significant failing in relation to accuracy".
The authority has directed the BBC to transmit a evening statement about its findings.
"As this represents a major infringement of our regulations, we are ordering the corporation to air a message of our conclusions against it on BBC Two at 9pm, with a date to be finalised," it said.
'Potential to Damage Trust'
The watchdog's statement said: "Our probe determined that the film's lack of disclosure that the narrator's father held a role in the Hamas-controlled authority was materially misleading.
"Consequently that the public did not have essential details which may have been very significant to their evaluation of the voice and the information he provided.
"Trust is at the core of the connection between a broadcaster and its viewers, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This oversight had the possibility to damage the exceptionally strong degrees of confidence that the public would have put in a documentary produced by the BBC about the conflict in Gaza."
The documentary was removed from iPlayer in the month of February after the boy's personal associations emerged, and in July an corporation's own inquiry found it violated the corporation's journalistic standards on factual correctness.
A BBC spokesperson said: "The Ofcom ruling is in line with the results of Peter Johnston's review, that there was a significant failing in the programme in relation to the corporation's content standards on factual correctness, which reflects clause 2.2 of the regulator's media standards.
"We expressed regret for this and we accept Ofcom's decision in its entirety. We will adhere to the directive as soon as the date and language are confirmed."
