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For thirty years, the Free Software Foundation has been seen as a guiding light for the free software movement, fighting for user freedom.

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Why the FSF gets copyright assignments from contributors

by Professor Eben Moglen, Columbia University Law School

[Explanatory note added in Jan 2013: this point applies to the packages that are FSF-copyrighted. When the developers of a program make it a GNU package, they can decide either to give the copyright to the FSF so it can enforce the GPL for the package, or else to keep the copyright as well as the responsibility for enforcing the GPL. If they make it an FSF-copyrighted package, then the FSF asks for copyright assignments for further contributions, and this page explains why.]

Under US copyright law, which is the law under which most free software programs have historically been first published, there are very substantial procedural advantages to registration of copyright. And despite the broad right of distribution conveyed by the GPL, enforcement of copyright is generally not possible for distributors: only the copyright holder or someone having assignment of the copyright can enforce the license. If there are multiple authors of a copyrighted work, successful enforcement depends on having the cooperation of all authors.

In order to make sure that all of our copyrights can meet the recordkeeping and other requirements of registration, and in order to be able to enforce the GPL most effectively, FSF requires that each author of code incorporated in FSF projects provide a copyright assignment, and, where appropriate, a disclaimer of any work-for-hire ownership claims by the programmer's employer. That way we can be sure that all the code in FSF projects is free code, whose freedom we can most effectively protect, and therefore on which other developers can completely rely.

[FSF logo] “Our mission is to preserve, protect and promote the freedom to use, study, copy, modify, and redistribute computer software, and to defend the rights of Free Software users.”

The Free Software Foundation is the principal organizational sponsor of the GNU Operating System. Support GNU and the FSF by buying manuals and gear, joining the FSF as an associate member, or making a donation, either directly to the FSF or via Flattr.

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