31 In State Bank of Victoria v Voss,[12] O'Bryan J considered that a deeming clause for the purpose of service of a demand under a guarantee was sufficient to establish service even if the notice were returned. Clause 15 is a contractual term for the benefit of each of the plaintiff and the defendant. In the absence of knowledge of actual receipt, it enables the plaintiff to calculate time pursuant to clause 5 by reference to the date upon which the notice was sent. The decision in Torrens is not helpful given the form of clause 11 in that case. However, it does raise the issue of what is the meaning of "deemed" used in clause 15 of the Put Option Deed. Did the parties to the deed intend to exclude "actual receipt" when the date of "actual receipt" is communicated to the giver of a notice. Referring to the ordinary meaning of "deem", there is a distinction between "believe to be" and "judged to be". The other methods of "giving" referred to in clause 15 deem receipt at the time one would normally expect receipt to have been effected. The provision in clause 15.2(b) permits certainty on the part of the giver of the notice in circumstances where it would not otherwise be able to conveniently and expeditiously establish the time of receipt. However, the plaintiff has chosen to avail itself of "registered" post rather than "ordinary" prepaid post. The registered post method permits a receipt to be given which was provided to the plaintiff. Hence, the plaintiff was in a position to calculate when its obligations to complete expired.