A party making a Calderbank offer that excludes costs orders in its favour bears the onus of disclosing the quantum of those costs; failure to do so may undermine the genuineness of the offer and prevent the offeror from obtaining a favourable costs order. The fact that an offeree is on notice that credibility will be challenged does not, without more, make rejection of a Calderbank offer unreasonable. Where there is a wide range of possible verdicts, an offer may be reasonable yet it may not be positively unreasonable for the offeree to reject it. The broader question of whether a fairness-based approach (beyond unreasonableness) should govern costs discretion following Calderbank offers was raised but not decided, as the Commonwealth had not put its case on that basis below.
The full text is available to signed-in members, including the 318 later cases that cite this judgment.
38 of the 318 citing cases carry a classified treatment. How each court treated it is available to signed-in members.