Fla. Stat. § 588.10
Posted notices to the public as required by s. 588.09 shall be signs upon which there shall appear prominently, in letters of not less than 2 inches in height, the word "posted," and in addition thereto there shall appear the name of the owner, lessee, or occupant of said land. Said posted notices shall be placed along, on, or close within the boundaries of any legally enclosed or posted land in a manner and in such position as to be clearly noticeable from the outside of the enclosure, and said notices shall be placed not farther than 500 feet apart along, and at each corner, of the boundaries of the land, and also at each gateway or opening of the fence enclosing the same. Said notices shall be placed along all boundaries formed by the waters mentioned herein on trees or posts close to the banks of said waters in position so as they may be noticeable to persons approaching the boundary formed by said waters.
Fla. Stat. § 588.10