The British broadcaster engaged in a "significant breach" of media regulations by failing to disclose that the presenter of a film about Gaza was the child of a Hamas official, as determined by regulatory body Ofcom.
An probe by Ofcom into the documentary titled Gaza: How to Survive a Warzone has found that the film was "materially misleading".
The BBC's director general had previously apologised, noting there had been "a significant failing in relation to factual correctness".
The authority has ordered the corporation to broadcast a evening announcement about its conclusions.
"As this represents a major infringement of our code, we are ordering the broadcaster to air a announcement of our conclusions against it on BBC Two at 21:00, with a schedule to be determined," it said.
'Risk to Damage Credibility'
The watchdog's statement stated: "The inquiry we conducted concluded that the film's omission to reveal that the presenter's male guardian served in a position in the Hamas-controlled government was materially misleading.
"Consequently that the viewers did not have essential details which may have been very significant to their evaluation of the voice and the details he provided.
"Credibility is at the center of the connection between a television network and its public, particularly for a state-funded media outlet such as the public broadcaster.
"This error had the potential to erode the significantly high amounts of trust that viewers would have invested in a BBC factual programme about the Israel-Gaza war."
The programme was removed from iPlayer in the month of February after the presenter's familial connections were revealed, and in the month of July an corporation's own inquiry concluded it breached the corporation's journalistic standards on factual correctness.
A BBC spokesperson 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 corporation's content standards on truthfulness, which reflects clause 2.2 of the regulator's media standards.
"We have apologised for this and we agree with the regulator's ruling in full. We will comply with the sanction as soon as the timing and wording are confirmed."
