Missouri Laws 272.270 – Fence owners may agree on maintenance — agreement recorded — refusal to ..
1. The several owners may, in writing, agree upon the portion of partition fences between their lands which shall be erected and maintained by each, which writing shall describe the lands and the parts of the fences so assigned, be signed and acknowledged by them, and filed and recorded in the office of the recorder of deeds of the county or counties in which they are situated. Any such agreement shall bind the makers, their heirs and assigns.
2. When one owner desires to make a division of the fence between his land and an adjoining landowner refuses to agree to a division, then the provisions of section 272.280 may be used to effect a division which shall be recorded in the office of the recorder of deeds in the county in which most of the fence is located.