What is the main purpose of requiring security for costs from the plaintiff?

The primary purpose of requiring security for costs from the plaintiff is to assure the defendant that they will have a means to recover their legal costs if the plaintiff's claim is unsuccessful. Security for costs acts as a financial safeguard for defendants against the risk that they may incur substantial legal fees without any potential for recovery, should the plaintiff not be able to satisfy any costs order that is made in favor of the defendant at the conclusion of the proceedings.

This requirement serves to balance the interests of both parties; while it allows plaintiffs to pursue legitimate claims, it simultaneously protects defendants from bearing unnecessary costs associated with defending frivolous or unmeritorious claims. Thus, the assurance provided by security for costs is critical in maintaining the integrity of the legal system, ensuring that defendants are financially safeguarded in the litigation process.