How do I find out if a classified document has already been declassified?

Finding out whether a classified document has already been declassified is often easier than people expect. A record can lose its classification through several routes, and once it does, the change is usually documented and the record may already be publicly accessible. The key is knowing where declassification status is recorded and where released materials end up.

Why a document may already be declassified

Classified records do not stay classified forever. They can become declassified through:

• Scheduled (automatic) declassification once a record reaches a certain age, as set by the governing executive order on classified national security information.
• Systematic review of older records by the originating agency or archives.
• Mandatory declassification review (MDR), a formal request that a specific document be reviewed.
• Release in response to a FOIA request, which may result in a record being declassified in full or in part.

Because of these channels, a document you are looking at may already have been processed, even if your copy still carries old classification markings.

Where to check

Start with these steps:

1. Look at the document itself. Declassified records often bear a stamp or notation showing a declassification date, authority, and sometimes redactions. Markings like a strike-through of the classification line are common indicators.
2. Search public release repositories. Agencies post released and declassified records in online reading rooms, and the National Archives maintains declassified holdings. A document released to one requester is frequently made available to everyone.
3. Contact the originating or custodial agency. The agency that created the record, or that now holds it, can confirm its current status and whether a prior review exists.
4. Consult oversight and archival resources. The Information Security Oversight Office (ISOO) oversees the government-wide classification and declassification system and can point you to the right policies and processes.

If it is still classified

If no prior declassification exists, you can submit a FOIA request or, for a specific record, a mandatory declassification review request. Both trigger a formal review and create a documented decision you can rely on.

For more on the process and related guidance, see the declassification topic hub.