The public service broadcaster was found to have committed a "significant breach" of broadcasting rules by omitting to mention that the presenter of a film about the Gaza situation was the son of a Hamas representative, as determined by UK media regulator Ofcom.
An investigation by Ofcom into Gaza: How to Survive a Warzone has found that the film was "significantly deceptive".
The BBC's director general had previously apologised, stating there had been "a major oversight in relation to truthfulness".
The authority has ordered the corporation to air a evening declaration about its decisions.
"As this represents a serious breach of our rules, we are ordering the corporation to transmit a announcement of our conclusions against it on BBC2 at 21:00, with a timing to be determined," the regulator stated.
'Potential to Damage Credibility'
The authority's announcement stated: "Our investigation found that the film's omission to reveal that the narrator's parent occupied a post in the Hamas-controlled administration was materially misleading.
"It meant that the public did not have critical information which may have been extremely pertinent to their evaluation of the presenter and the details he presented.
"Confidence is at the center of the relationship between a broadcaster and its public, particularly for a state-funded media outlet such as the public broadcaster.
"This oversight had the risk to undermine the exceptionally strong degrees of trust that viewers would have placed in a BBC factual programme about the conflict in Gaza."
The documentary was pulled from iPlayer in February after the boy's personal associations were revealed, and in July an corporation's own inquiry found it breached the organization's content policies on truthfulness.
A representative for the broadcaster commented: "The authority's determination is in agreement with the results of the internal assessment, that there was a significant failing in the documentary in relation to the BBC's Editorial Guidelines on truthfulness, which reflects Rule 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we accept the regulator's ruling in complete. We will follow the sanction as soon as the timing and language are finalised."