Submit your prior authorization using TMHP's PA on the Portal and receive request decisions more quickly than faxed requests. To document an individual's request to withdraw from the Money Follows the Person Demonstration (MFPD). Procedure.Submit your prior authorization using TMHP's Prior Authorization (PA) on the Portal and receive request decisions. Purpose: This form is used when a student wishes to return to Texas Southern University after an official medical withdrawal. To withdraw or cancel this authorization, written notice must be sent to: Harris Health System, HIM Release of.