Okla. Stat. tit. 4, § 4-149: Fence or improvements on land of another - Removal -

Damages - Notice to remove - Effect of nonremoval.

When a person has made a fence or other improvements on land,

which, on afterwards making division lines, is found to be on the

land of another, such person shall not remove such fence or other

improvements, until he shall have paid to the owner of such land all

damages by reason of such improvements or fence being so located,

and if the person making such fence or other improvements fail to

pay such damages and remove the said improvements within six (6)

months after such division line has been established, and after

having thirty (30) days' notice from the owner of said land to

remove such fence or improvements, then said fence or improvements

shall become a part of the real estate and belong to the owner

thereof: Provided, that when the parties interested in such land

and such fence and improvements cannot agree as to the amount of

such damages, by reason of such improvements being upon the land of

another, the fence viewers may determine the amount of such damages

as in other cases.