Unconditional delivery refers to a delivery that immediately passes both possession and title and that takes effect immediately. In a case where, condition precedent is attached to a contract of sale and delivery, a property does not vest in the vendee on delivery, until s/he performs the condition, or the seller waives it. However, an unconditional delivery is regarded as a waiver of the condition. Moreover, a gift made with an intention to take effect immediately and irrevocably, and fully executed by a complete and unconditional delivery, is good and valid as a gift inter vivos, although at the time the donor is in extremis. [Keller v. McConville, 175 Mich. 479 (Mich. 1913)].