The BBC engaged in a "major breach" of industry standards by omitting to mention that the narrator of a film about Gaza was the son of a Hamas official, as ruled by regulatory body Ofcom.
An probe by the media regulator into the programme Gaza: How to Survive a Warzone has found that the documentary was "materially misleading".
The chief executive of the broadcaster had previously apologised, noting there had been "a major oversight in relation to truthfulness".
Ofcom has instructed the broadcaster to transmit a evening announcement about its decisions.
"As this represents a serious breach of our rules, we are instructing the corporation to air a statement of our determinations against it on BBC Two at nine o'clock in the evening, with a timing to be determined," the statement read.
'Possibility to Damage Credibility'
The regulator's announcement stated: "Our investigation determined that the programme's failure to disclose that the presenter's parent held a post in the Hamas-run authority was materially misleading.
"Consequently that the viewers did not have critical information which may have been extremely pertinent to their evaluation of the presenter and the details he shared.
"Trust is at the heart of the relationship between a media organization and its public, notably for a state-funded media outlet such as the BBC.
"This failing had the potential to undermine the exceptionally strong degrees of trust that audiences would have invested in a documentary produced by the BBC about the Gaza conflict."
The film was withdrawn from iPlayer in the month of February after the presenter's familial connections emerged, and in the month of July an corporation's own inquiry concluded it infringed the organization's content policies on truthfulness.
A corporation official stated: "The authority's determination is in accordance with the results of the corporation's inquiry, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which reflects regulation 2.2 of the regulator's media standards.
"We issued an apology for this and we comply with the authority's determination in complete. We will follow the directive as soon as the timing and wording are determined."
