Kean v DunfoyNZLR611 is a cited New Zealand case regarding implied time limits to accept an offer, otherwise the offer lapses. In this case, it was held that a period of 12 months in accepting an offer was too long.
The Court held that to accept an offer, a party must communicate their acceptance of the offer within a reasonable period of time. Here it was held that a period of 12 months was not a reasonable period of time to letlapse.