Okla. Stat. tit. 58, § 58-548: Representative or guardian may be cited by successor -

Accounting by personal representative of deceased executor,

administrator or guardian.

When the authority of an executor or administrator or of the

guardian of any incompetent or insane or minor person ceases or is

revoked for any reason he may be cited to account before the

district court at the instance of the person succeeding to the

administration or the guardianship of the same estate, in like

manner as he might have been cited by any person interested in the

estate during the time he was such executor or administrator or

guardian.

If the executor or administrator, or if the guardian of any

incompetent or insane or minor person dies, his accounts may be

presented by his personal representative to, and settled by, the

court in which the estate of which he was executor or administrator

or guardian, is being administered, or is pending, and, upon

petition of the successor of such deceased executor or

administrator, or guardian, such court shall compel the personal

representative of the deceased executor or administrator or guardian

to render an account of the administration or guardianship of his

testator or intestate, or ward as the case may be, and must settle

such account as in other cases.