Okla. Stat. tit. 64, § 64-1030

Disposition of cash and equivalents – Lock box services.

The Secretary of the Land Office shall cause all mail received

by the Land Office to be opened by some employee designated by the

Secretary, assisted by two other employees not connected with the

cashier's office, whose duty shall be to examine all incoming mail

and make a proper reception record of all monies received. The

reception record shall be delivered to the cashier. The entries on

the reception record shall be made at the time of the opening of the

letters and when completed shall be signed by the maker and

witnessed by the employees assisting, who shall also sign. All cash

and cash equivalents, together with the reception record, shall be

immediately delivered to the cashier who shall give a receipt

therefor by signing the original copy of the reception record, and

who shall make proper entries on the financial records of the Land

Office showing the amount so received. The Secretary to the

Commissioners of the Land Office and the cashier are charged jointly

and severally with the proper keeping and it is hereby made their

duty to see that the above and foregoing reception record is

correctly kept. Alternatively, or in addition to the procedures set

forth in this section, the Secretary may also purchase lock box

collection services from an appropriate vendor for the handling,

collection and processing of mail. Lock box services may include

collecting Land Office mail from a specified post office, sorting,

totaling, and recording payments, processing the items and making

deposits.