Okla. Stat. tit. 70, § 70-5-187

claims – Notice.

All unencumbered balances, if any, as shown by the officer

charged with keeping the appropriation and expenditure records of

the school district on hand at the close of day June 30, may remain

as a credit for said fiscal year up to the close of day September

30. If a date earlier than September 30 is established, the

encumbrance clerk shall publish, on the district’s web site for two

consecutive times if also published in a daily newspaper and once if

published in a weekly newspaper of general circulation in the school

district, notice of the date set by the board of education for the

submission of all claims against unencumbered balances of the prior

fiscal year in the following form:

PUBLIC NOTICE

All having a claim against the ____ Public School District are

notified that all invoices and required documentation pertaining to

an approved purchase order for services rendered or goods or

materials delivered pursuant to that purchase order must be recorded

with the encumbrance clerk of the district on or before the ____ day

of _____, 20__, covering all debts now unpaid and incurred during

the period of the prior fiscal year beginning on July 1, 20__, and

ending on June 30 20___, or the claim upon which the invoice or

purchase order is based shall be void and forever barred.

__________________________

District Encumbrance Clerk

This section shall not permit the incurring of new indebtedness

chargeable to the appropriation account of the immediately preceding

fiscal year.