Okla. Stat. tit. 30 § 3-216
A conservator may be discharged by the court upon the application of the ward or otherwise upon such notice to the conservator and next of kin of said ward as the court may determine reasonable and proper, when it appears that the conservatorship is no longer necessary. In the event of the death, resignation or removal of a conservator, the court, on the application of the former ward and upon such notice to the next of kin of said ward as the court may order, may certify that said ward is discharged by operation of law if it appears that the conservatorship of said ward is no longer necessary. Upon the termination of a conservatorship, a conservator shall account to the court as otherwise provided by the Oklahoma Guardianship and Conservatorship Act for guardians of property.
Okla. Stat. tit. 30, § 3-216