Okla. Stat. tit. 21, § 21-341.1: Postage meter - Unlawful use

Every person who uses a postage meter that is owned, operated or

has been installed by any state department, board, commission or

state educational institution, for his own personal use, or to the

use of any person not entitled thereto, without authority of law, is

guilty of a misdemeanor. Each state department, board, commission

or state educational institution which has installed a postage meter

machine shall place an imprint plate on such machine showing: first,

that the mail carried by such postage is official State of Oklahoma

mail; and second, that there is a penalty for the unlawful use of

such postage meters for private purposes. The installation and cost

of such imprint plates shall be paid from appropriations for postage

and contingent expenses made to the various state departments,

boards, commissions or state educational institutions.