The BBC engaged in a "major breach" of broadcasting rules by not revealing that the voice of a programme about the Gaza situation was the child of a Hamas representative, according to UK media regulator Ofcom.
An investigation by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has found that the programme was "materially misleading".
The head of the BBC had already issued an apology, saying there had been "a serious error in relation to accuracy".
The regulator has ordered the corporation to broadcast a evening statement about its decisions.
"Given this constitutes a serious breach of our regulations, we are directing the corporation to broadcast a statement of our findings against it on BBC Two at 9pm, with a timing to be finalised," the statement read.
'Risk to Erode Confidence'
The authority's report stated: "Our probe determined that the documentary's failure to disclose that the voice's father occupied a role in the Hamas-controlled authority was materially misleading.
"This implied that the public did not have vital facts which may have been highly relevant to their assessment of the presenter and the content he presented.
"Trust is at the center of the bond between a broadcaster and its public, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the possibility to erode the significantly high amounts of credibility that audiences would have put in a documentary produced by the BBC about the Gaza conflict."
The programme was withdrawn from iPlayer in the month of February after the boy's familial connections came to light, and in the month of July an broadcaster's internal assessment determined it breached the corporation's editorial guidelines on accuracy.
A representative for the broadcaster commented: "The authority's determination is in line with the results of the corporation's inquiry, that there was a major oversight in the programme in relation to the BBC's Editorial Guidelines on truthfulness, which aligns with regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we agree with the authority's determination in its entirety. We will comply with the sanction as soon as the timing and language are determined."
