1. Unpaid costs from previous proceedings do not automatically or per se entitle a party to a stay of subsequent proceedings. A stay is a discretionary remedy that requires proof that the proceedings are vexatious or constitute an abuse of process. 2. For an appellate court to interfere with a costs order, the applicant must demonstrate that the discretion was exercised arbitrarily, capriciously, on wrong principles, or was affected by a material misdirection - the defendants failed to establish any such basis. 3. Rule 27 of the Uniform Rules of Court requires a party seeking to uplift a bar to establish good cause, which includes: (a) a reasonable and acceptable explanation for the default in pleading; and (b) a bona fide defence which prima facie carries some prospect of success. 4. A party who strategically elects not to plead while pursuing a stay application, and becomes barred, must still satisfy all requirements under Rule 27, including establishing a bona fide defence. The pursuit of a stay application does not excuse compliance with this requirement. 5. Without a bona fide defence, there is no purpose in lifting a bar, as it would simply result in the continuation of a contested action where there is no valid defence to the plaintiff's claim. 6. Under s 16(2) of the Superior Courts Act, appeals may be dismissed where the decision sought will have no practical effect or result, and this is determined without reference to costs considerations.