The British broadcaster committed a "serious breach" of industry standards by not revealing that the presenter of a programme about Gaza was the child of a Hamas representative, as determined by British broadcasting authority Ofcom.
An probe by the media regulator into Gaza: How to Survive a Warzone has found that the documentary was "materially misleading".
The head of the BBC had already issued an apology, saying there had been "a significant failing in relation to accuracy".
The authority has ordered the corporation to transmit a evening announcement about its conclusions.
"As this represents a significant violation of our regulations, we are instructing the broadcaster to transmit a statement of our findings against it on the BBC's second channel at 9pm, with a date to be determined," the statement read.
'Potential to Undermine Trust'
The authority's announcement said: "The inquiry we conducted concluded that the documentary's failure to disclose that the presenter's father served in a post in the Hamas-run administration was materially misleading.
"It meant that the viewers did not have critical information which may have been very significant to their evaluation of the voice and the content he presented.
"Trust is at the core of the connection between a television network and its public, notably for a public service broadcaster such as the BBC.
"This error had the potential to undermine the very considerable levels of credibility that the public would have invested in a documentary produced by the BBC about the conflict in Gaza."
The documentary was withdrawn from iPlayer in last February after the presenter's family links were revealed, and in this past July an broadcaster's internal assessment determined it infringed the organization's journalistic standards on accuracy.
A corporation official commented: "The Ofcom ruling is in accordance with the results of the internal assessment, that there was a major oversight in the film in relation to the broadcaster's journalistic policies on accuracy, which reflects regulation 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 comply with the directive as soon as the schedule and wording are finalised."
