The BBC committed a "serious breach" of industry standards by not revealing that the presenter of a documentary about the Gaza conflict was the child of a Hamas administrator, as determined by regulatory body Ofcom.
An inquiry by Ofcom into the documentary titled Gaza: How to Survive a Warzone has found that the programme was "materially misleading".
The chief executive of the broadcaster had earlier expressed regret, noting there had been "a serious error in relation to truthfulness".
Ofcom has ordered the corporation to transmit a evening declaration about its decisions.
"As this represents a significant violation of our code, we are instructing the BBC to air a message of our conclusions against it on the BBC's second channel at nine o'clock in the evening, with a date to be confirmed," it said.
'Possibility to Undermine Confidence'
The watchdog's report stated: "Our probe found that the film's failure to disclose that the presenter's parent served in a role in the Hamas-run authority was significantly deceptive.
"Consequently that the viewers did not have critical information which may have been extremely pertinent to their evaluation of the narrator and the content he shared.
"Credibility is at the heart of the connection between a media organization and its audience, particularly for a public service broadcaster such as the BBC.
"This oversight had the risk to undermine the significantly high amounts of trust that viewers would have placed in a documentary produced by the BBC about the Gaza conflict."
The film was removed from iPlayer in the month of February after the boy's family links were revealed, and in the month of July an broadcaster's internal assessment concluded it infringed the organization's journalistic standards on factual correctness.
A corporation official commented: "The regulator's decision is in line with the conclusions of the corporation's inquiry, that there was a major oversight in the documentary in relation to the BBC's Editorial Guidelines on truthfulness, which reflects clause 2.2 of the regulator's media standards.
"We have apologised for this and we agree with the authority's determination in complete. We will follow the directive as soon as the schedule and wording are confirmed."