The protection rests on a mix of state shield laws, qualified constitutional or common-law privileges, and journalistic ethics. Breaking a genuine confidentiality promise can itself expose a publisher to separate liability theories, such as promissory estoppel, distinct from any privilege analysis.

Courts asked to compel disclosure typically weigh the requesting party's need for the information, whether it's available from non-journalist sources, and the strength of the applicable privilege in that jurisdiction. Criminal cases and matters implicating public safety generally produce the weakest source protection.

In Juricratic, a source-confidentiality-honored toggle interacts with both the discovery-cost dial and a separate contract or promissory-estoppel exposure branch, letting a user see that protecting a source and being sued for breaking a promise to protect a source are two distinct, independently modeled risks.

In-house counsel for a news organization advises reporters on the limits of confidentiality promises and the organization's exposure if a court later compels disclosure despite the reporter's pledge.