Okla. Stat. tit. 58, § 58-1256: Effect of deed on joint tenancy – “Joint owner” defined

A. A record joint owner of an interest in real estate may use

the procedures in the Nontestamentary Transfer of Property Act to

title the interest in transfer-on-death form. However, title to the

interest shall vest in the designated grantee beneficiary or

beneficiaries only if the record joint owner is the last to die of

all of the record joint owners of the interest. A deed in transfer-

on-death form shall not sever a joint tenancy.

B. As used in this section, "joint owner" means a person who

owns an interest in real estate as a joint tenant with right of

survivorship.