Okla. Stat. tit. 19, § 19-894

No claims shall be paid by the clerk of said district until the

same shall have been presented and allowed by the board of directors

and only upon warrants signed by the president and countersigned by

the clerk, and if the district treasurer has not sufficient money on

hand to pay such warrants when presented, he shall endorse thereon

"not paid for want of funds" and endorse thereon the date presented,

over his signature, and from the time of such presentation until

paid such warrant shall draw interest at the rate of six percent

(6%) per annum. All claims against the district shall be verified

the same as is required in the case on claims filed against the

counties in this state, and the clerk of the district is hereby

authorized and empowered to administer oaths to the parties

verifying such claims the same as a county clerk or a notary public

might do. The district clerk shall keep a register in which he

shall enter each warrant presented for payment, showing the date and

amount of such warrant, to whom payable, the date of the

presentation for payment, the date of payment, and the amount paid

in redemption thereof, and all warrants shall be paid in the order

of their presentation for payment to the district clerk. All

warrants shall be drawn and payable to the claimant or bearer.