C.R.S. § 4-7-506
4-7-506. Delivery without indorsement - right to compel indorsement
4-7-506. Delivery without indorsement - right to compel indorsement. 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.