An application for security for costs is governed by CPR 25.12 and CPR 25.13. It allows a defendant to apply for protection against the risk of being unable to enforce any costs order that may be obtained. The order, if made, usually requires the claimant to make payment of money into court, which the defendant can then use to enforce any costs award they may later obtain. Save that CPR 25.12(2) provides that an application for security for costs must be supported by written evidence (covering the conditions to be satisfied in CPR 25.13), there are no special procedural rules for security for costs applications. Instead, CPR 23 will apply. The application notice, containing the witness statement in support, should be issued as soon as it becomes apparent that it is necessary or desirable, and, if possible, so that they can be considered