Monday's release of documents focused on Section 215 of the Patriot Act, which allows the bulk collection of U.S. phone records.
The document release is part of an administration-wide effort to preserve the NSA's ability to collect bulk data, which it says is key to tracking key terror suspects, but which privacy activists say is a breach of the Constitution's ban on unreasonable search and seizure of evidence from innocent Americans.
The release of the documents comes ahead of a House Intelligence Committee hearing Tuesday on FISA reform.
The documents support administration testimony that the NSA worked to operate within the law and fix errors when they or their systems overreached.
One of the documents shows the NSA admitting to the House Intelligence Committee that one of its automated systems picked up too much telephone metadata. The February 2009 document indicates the problem was fixed.