When you talk to your friends and family on Snapchat or Facebook, you should be assured that those services will not freely disclose your communications to the government or other private parties.

That is why the California Supreme Court must take up and reverse the appellate opinion in the case of Snap v. The Superior Court of San Diego County. This opinion dangerously weakens the Stored Communications Act (SCA), which is one of the few federal privacy laws on the books. The SCA prevents certain communications providers from disclosing the content of your communications to private parties or the government without a warrant (or other narrow exceptions).

EFF submitted an amicus letter to the court, along with the Center for Democracy & Technology.

The lower court incorrectly ruled that modern services like Snapchat and Facebook largely do not have to comply with the 1986 law. Since those companies already access the content of your communications for their own business purposes—including to target their behavioral advertising—the lower court held that they can also freely disclose the content of your communications to anyone.

The ruling came in the context of a criminal defendant who sought access to the communications of a deceased victim with a subpoena. In compliance with the law, both Meta and Snap resisted disclosing the information.

The lower court’s opinion conflicts with nearly 40 years of interpretation by Congress and other courts. It ignores the SCA’s primary purpose of protecting your communications from disclosure. And the opinion gives too much weight to companies’ terms of service. Those terms, which almost no one reads, is where most companies bury their own right to access to your communications.

There is no doubt that companies should also be restricted in how they access and use your data, and we need stronger laws to make that happen. For years, EFF has advocated for comprehensive data privacy legislation, including data minimization and a ban on online behavioral advertising. But that does not affect the current analysis of the SCA, which protects against disclosure now.

If the California Supreme Court does not take this up, Meta, Snap, and other providers would be allowed to voluntarily disclose the content of their users’ communications to any other corporations for any reason, to parties in civil litigation, and to the government without a warrant. Private parties could also compel disclosure with a mere subpoena.