From the perspective of a plaintiff (or a group of plaintiffs) considering initiating a class action in a Thai court, a primary benefit of proceeding as a class action is the ability to aggregate claims that would otherwise be too small or too costly to bring individually. Where one plaintiff might lack a claim large enough to make pursuing litigation a cost-effective option, the combined claims of many plaintiffs could surpass that threshold. Similarly, the prospect of representing a number of plaintiffs, along with the potential legal fees that could be awarded with a win, should serve as an incentive for counsel to represent a class of plaintiffs who, acting individually, would otherwise not be able to engage a lawyer interested in taking their case. For these same reasons, a defendant will most likely—although not necessarily always—oppose a plaintiff’s request that a case be allowed to proceed as a class action. From a defense perspective, preventing a case from proceeding as a class action could be a significant strategic goal, as it could mean that individual plaintiffs, as well as their counsel, would lack the financial incentive to pursue potentially costly litigation for their separate, relatively low-value claims. Potential defendants, therefore, may benefit considerably by understanding how a Thai court determines whether a case can proceed as a class action and, if it does, the potential options for a defendant that objects to this determination. The Court’s Initial Determination: Class Action or Ordinary Litigation? When a named plaintiff requests that a case proceed as a class action, that plaintiff must present the case to the court in accordance with the prerequisites stipulated by Thai law. The Civil Procedure Code (CPC) sets out the prerequisites for a case to proceed as a class action. Considerations include: whether the nature of