The transferee of a negotiable tangible document of title has a specifically enforceable right to have its transferor supply any necessary indorsement, but the transfer becomes a negotiation only as of the time the indorsement is supplied.
Utah Code § 70A-7a-506
Delivery without indorsement -- Right to compel indorsement
Enacted by Chapter 42, 2006 General Session
Official source: Utah State Legislature. Reproduced from public-domain Utah statutes; confirm against the official source for the current text. Not legal advice.