In the state of Oklahoma, there is a $10 certification fee charged to file the Mortgage Affidavit.
In LodeStar's Calculator, within Section E, this fee is listed as "County - Mortgage Tax". We bundle this fee into the mortgage tax section rather than a recording fee because it is directly related to the mortgage tax calculation/ exemption amounts:
For more information, please consult:
https://www2.tulsacounty.org/treasurer/payments/mortgage-tax-calculator/
REVISED from $5 to $10 on November 1st, 2025:
https://www.billtrack50.com/billdetail/1784197