What is the punishment for reversion from Islam, according to Islamic Sharia?

Fatwa, posted 4.22.2010
Religious Authority: 
Yusuf al-Qaradawi
Fatwa Question or Essay Title: 
What is the punishment for reversion from Islam, according to Islamic Sharia?

Executing whoever reverts from Islam is the responsibility of the state and is to be decided by Islamic governments alone. Islamic organizations and establishments cannot make such rulings nor can they carry them out. In any case, a considerable number of our predecessors (Salaf) agreed that not all who revert from Islam are to be executed, but rather those who declare their action in public and may cause unrest by bringing down the name of Allah, His prophet, or the Muslims. The punishment of execution in this case is to protect and preserve the entire nation from the evil that this individual will undoubtedly bring, and is not a case of confiscating his or her rights to expression and belief. Indeed, by committing such an act, the individual has transgressed upon the rights of others as well as the entire state and nation, which come before anyone's individual rights. Modern legislation uses the term "Grand Treason" for crimes similar to the act of one who reverts from Islam then announces this in public and wages a campaign against Islam and the entire nation.