Tex. R. App. P. 52.1
As amended through August 27, 2024
An original appellate proceeding seeking extraordinary relief - such as a writ of habeas corpus, mandamus, prohibition, injunction, or quo warranto - is commenced by filing a petition with the clerk of the appropriate appellate court. The petition must be captioned "In re [name of relator]."
Tex. R. App. P. 52.1