50 Secondly, the fact that the entity apparently responsible for the letter - Sena Developments - was not the same as the entity whose address was being changed - i.e., Alramon - is not enough of itself to prevent it being an effective notice under clause 12.6. This, in our opinion, is established by a case on which Jonamill itself relied. In Robinson v Becata Pty Limited [2004] NSWSC 310 (discussed above at [37 - 39]), the relevant notices were sent by Treloar Holdings Pty Ltd, but their terms clearly showed that this company was acting on behalf of Becata. At [54 - 57], the Court set out the reasons why the notices should be treated as notices 'of Becata' and should therefore be given their full effect:-
54 … in construing the alleged notice to complete, and notice of rescission, the background information known to the recipient of the notice can be used as an aid to its construction. In the present case, the addressee of the letters, Mr Robinson, was aware that he had agreed to purchase 58A Jones Street, Kingswood from Becata, and that Mr H Treloar was a director of Becata. The letters all clearly relate to 58A Jones Street, Kingswood. There is no suggestion that Mr Robinson had any other business transaction at all with Treloar Holdings Pty Ltd, or any other company in the Treloar group of Companies.
55 While the fourth and fifth letters in the series are the ones on which the validity of the rescission depends, those letters can be construed bearing in mind earlier letters in the series. The earlier letters in the series are themselves part of the relevant background information which the recipient would, by the time of the fourth and fifth letters, be taken to have…
56 The fourth and fifth letters are the letters which, if they were to be effective, would need to be written either by or with the authority of Becata. From the point of view of the recipient of a notice to complete, or a notice of rescission, it does not matter whether the notice is written actually by Becata, or on behalf of Becata - what matters is that, in one way or another, it is a letter of Becata.