Okla. Stat. tit. 58, § 58-289: Additional inventory

Whenever property not mentioned in an inventory that is made and

filed, comes to the possession or knowledge of an executor or

administrator, he must cause the same to be appraised in the manner

prescribed in this article, and an inventory thereof to be returned

within two (2) months after the discovery; and the making of such

inventory may be enforced, after notice, by attachment or removal

from office.