Okla. Stat. tit. 42, § 42-143.1

A. Within five (5) business days after the date of the filing

of the lien statement provided for in Sections 142 and 143 of this

title, a notice of the lien shall be mailed by certified mail,

return receipt requested, to the owner of the property on which the

lien attaches. The claimant shall furnish to the county clerk the

last-known mailing address of the person or persons against whom the

claim is made and the owner of the property. The notice shall be

mailed by the county clerk. The fee for preparing and mailing the

notice of mechanics' and materialmen's lien and costs for each

additional page or exhibit shall be as provided for in Section 32 of

Title 28 of the Oklahoma Statutes and shall be paid by the person

filing the lien. The fee shall be deposited into the County Clerk's

Lien Fee Account, created pursuant to the provisions of Section 265

of Title 19 of the Oklahoma Statutes.

B. The notice shall contain the date of filing; the name and

address of the following: The person claiming the lien; the person

against whom the claim is made and the owner of the property; a

legal description of the property; and the amount claimed. Provided

that, if with due diligence the person against whom the claim is

made or the owner of the property cannot be found, the claimant

after filing an affidavit setting forth such facts may, within sixty

(60) days of the filing of the lien statement, serve a copy of the

notice upon the occupant of the property or the occupant of the

improvements, as the case may be, in a like manner as is provided

for service upon the owner thereof, or, if the same be unoccupied,

the claimant may post a copy in a conspicuous place upon the

property or any improvements thereon.