Okla. Stat. tit. 11, § 11-37-231: Bond payment and cancellation

The municipality shall have the right to call and pay in numerical

order the bonds or any number thereof in the following manner:

Whenever there shall be sufficient funds in the hands of the

municipal treasurer after the payment of all interest due and to

become due within the next six (6) months, the treasurer, on or

before March 10 and September 10 of any year, shall give notice by

certified mail addressed to the last-registered holder of the bonds

called, at the address appearing upon the registry, that there has

accumulated funds sufficient to pay the designated bonds, and

interest thereon to April 1 next or October 1 next, as the case may

be, and directing the presentation of the bond or bonds for payment

and cancellation. The bond or bonds which are called will cease to

bear interest after April 1 or October 1, as provided in the notice.

Upon the payment and cancellation of the bond or bonds, proper entry

thereof shall be made upon the books of the clerk and treasurer or

appointed agent. Upon the accumulation of sufficient funds as

herein provided, the municipal treasurer shall pay the bonds so

called and, in the event of failure to do so, he shall be liable for

all such damages as may result therefrom. The provisions of this

section may be enforced by appropriate proceedings in mandamus

against the treasurer.