Letter of Incarceration Form The letter of incarceration request forms are used to request documentation, or verification, of an inmate’s incarceration at the St. Martin Parish Jail. Please indicate the date or date range for which you are requesting verification. Letter of Incarceration Request Form Letter of Incarceration Request – Civilian Form (PDF) Online Inmate Search Inmate Money / Commissary Letter of Incarceration Form Reporting Crimes PAY TRAFFIC TICKETS Offender Watch Inmate Locator Pay Property Taxes