California, United States of America
The following excerpt is from People v. Floyd, C053119 (Cal. App. 5/31/2007), C053119 (Cal. App. 2007):
When a defendant enters a plea of guilty or no contest, she may not challenge the validity of the plea on appeal unless she "has sought, and the trial court has issued, a certificate of probable cause `showing reasonable constitutional, jurisdictional, or other grounds going to the legality of the proceedings.'" (People v. Emery (2006) 140 Cal.App.4th 560, 562; see Pen. Code, 1237.5.)
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