The transferee of a negotiable tangible document of title has a specifically enforceable right to have its transferor supply any necessary endorsement but the transfer becomes a negotiation only as of the time the endorsement is supplied.
Okla. Stat. tit. 12A, § 7-506
Oklahoma Code Comment
Prior Statutory Provisions:
2 O.S. §9-102.
Text and derivation of prior provisions, see Appendix at end of this title.
Comment:
This is similar to former 2 O.S. § 9-102.