A vendor who has terminated a contract for the sale of land should be wary of serving a second notice to complete because the second notice revives the agreement that has been terminated.
In Rona v Shimden  NSWSC 818 a vendor under a contract of sale claiming to have terminated the contract, gave notice to complete which was expressed to be without prejudice to its contention that the contract was terminated. White J at  analysed the position as follows:
The giving of a notice to complete may give rise to an estoppel which precludes the party giving the notice from asserting that the contract has been terminated. Here, the purchaser did not do anything consequent upon the service of the notice which could create such an estoppel. Estoppel aside, the service of a notice to complete without prejudice to a prior notice of termination takes effect as an offer to revive the agreement, capable of being accepted by performance in accordance with the terms of the notice to complete: Lohar Corporation Pty Ltd v Dibu Pty Ltd(1976) 1 BPR 9177 at 9184, 9187.
In Naval and Military Club v Southraw  VSC 593 Byrne J accepted this analysis. See: also Portbury Development Co Pty Ltd v Ottedin Investments Pty Ltd & Ors  VSC 57.