Do you have to fill out a visiting form for every prison, And why would they move someone to Mississippi state prison

If your inmate is in the Mississippi Department of Corrections facility, then he has been sentenced to a state crime. The State decides what custody level the inmate serves his time. If your inmate was transferred to MS DOC, from a county facility, you will have to resubmit the visitation paperwork. If he gets moved within the MS DOC system, your paperwork will be on file and be valid wherever you visit.