The public service broadcaster was found to have committed a "significant breach" of media regulations by failing to disclose that the narrator of a film about the Gaza conflict was the offspring of a Hamas official, as determined by regulatory body Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has found that the documentary was "materially misleading".
The head of the BBC had earlier expressed regret, noting there had been "a significant failing in relation to truthfulness".
The authority has ordered the corporation to broadcast a prime-time declaration about its conclusions.
"As this represents a serious breach of our regulations, we are directing the corporation to transmit a statement of our findings against it on BBC2 at nine o'clock in the evening, with a date to be confirmed," it said.
'Risk to Erode Confidence'
The watchdog's statement declared: "Our investigation found that the documentary's failure to disclose that the voice's male guardian held a role in the Hamas-controlled government was materially misleading.
"This implied that the audience did not have essential details which may have been very significant to their evaluation of the presenter and the information he provided.
"Confidence is at the core of the relationship between a broadcaster and its public, notably for a public service broadcaster such as the public broadcaster.
"This oversight had the potential to damage the significantly high degrees of credibility that the public would have invested in a documentary produced by the BBC about the Gaza conflict."
The programme was withdrawn from the online platform in last February after the boy's personal associations came to light, and in July an corporation's own inquiry determined it violated the corporation's editorial guidelines on factual correctness.
A representative for the broadcaster stated: "The Ofcom ruling is in accordance with the findings of Peter Johnston's review, that there was a significant failing in the film in relation to the BBC's Editorial Guidelines on accuracy, which corresponds to clause 2.2 of the regulator's media standards.
"We issued an apology for this and we comply with Ofcom's decision in its entirety. We will comply with the directive as soon as the date and language are determined."
