In the case of Barr v. Matteo, two former employees of the Office of Rent Stabilization sued its acting director for defamation due to a press release he issued regarding their dismissal. The Supreme Court ruled in favor of the defendant, holding that federal officials are immune from civil liability for defamatory statements made within the scope of their official duties. This immunity is not dependent on whether or not they acted with malice or improper motives and extends to matters directly related to their office's functions even if it involves an error in judgement or discretion. The court reasoned that this protection was necessary so as not to deter public officers from performing their duties effectively out of fear for personal liability.

In the dissenting opinion for Barr v. Matteo, Justice Black and Justice Frankfurter argued that federal officials should not be granted absolute immunity from defamation lawsuits related to their official duties. They contended that this broad interpretation of privilege could potentially shield malicious or dishonest actions by public servants, undermining public trust in government institutions. The justices emphasized the importance of maintaining a balance between protecting officials’ ability to perform their roles without fear of litigation and holding them accountable for potential abuses of power. They also pointed out that other legal mechanisms exist to protect honest mistakes made in good faith by these individuals, making such sweeping immunity unnecessary.