Miss. Code Ann. § 19-13-23: Miss. Code Ann. § 19-13-23

Any person having a just claim against any county shall first file the same on or before the last day of the month for which such claim may be payable, with the clerk of the board of supervisors for presentation to the board for allowance, which said claim shall be properly dated and itemized, and shall be accompanied by any evidence of performance or delivery as required by Section 19-13-25 . The claimant may amend said claim at any time before final rejection or allowance, and may appear before the board and submit further evidence or argument in support thereof, having a continuance for either or both of said purposes if desired.