Okla. Stat. tit. 63, § 63-1-314: Delayed death certificate

(a) When a death occurring in this state has not been

registered, a certificate may be filed in accordance with

regulations of the State Board of Health. Such certificate shall be

registered subject to such evidentiary requirements as the Board

shall by regulation prescribe, to substantiate the alleged facts of

death.

(b) Certificates of death registered one year or more after the

date of occurrence shall be marked "delayed" and shall show on their

face the date of the delayed registration.