Okla. Stat. tit. 19, § 19-1259: Registration of bonds - Transfer or assignment

The owner or holder of any road improvement bonds heretofore or

hereafter issued by any county in the State of Oklahoma for the

payment of road or street improvements in any such county shall

register such bond with the county clerk or appointed agent of such

county by presenting same to such clerk, who shall thereupon enter

in a book to be kept for that purpose, a description of such bond,

and the name of the owner or holder presenting the same for

registration, and the date of registration thereof, and endorse upon

such bond, over his signature, or a facsimile of his signature, the

legend, "registered in my office". After registration of any such

bond no transfer or assignment thereof shall be valid until such

transfer or assignment has been registered with the clerk or

appointed agent of such county.