Post-conviction relief proceeding (often called a 3850 motion or 3.850 motion) is a criminal procedure whereby a convicted criminal can request that a conviction or sentence be corrected or vacated. This proceeding is designed as a partial substitute for habeas corpus, in which the Court reviews claims of a convicted offender that his/her constitutional rights were violated.
Through a post-conviction relief proceeding, a criminal defendant may challenge collaterally a judgment of conviction which has otherwise become final in the normal appellate review process.