Historically, the term "courier" has described various vital roles, from the "kashariyot" who acted as lifelines during the Holocaust to modern-day specialized gamete couriers who transport sensitive biological materials across borders [7, 20]. Today, a courier is defined as a person or company specializing in the direct, secure, and rapid transportation of items from one location to another [8, 35].

As e-commerce continues to skyrocket, the industry is turning toward emerging technologies like Artificial Intelligence (AI) , machine learning, and digital twins to improve efficiency [15, 23]. New niches are also appearing, such as lottery couriers who legally fulfill ticket orders for customers via mobile apps, expanding the definition of what a courier can deliver [24].

The digital transformation has introduced "crowdshipping" or platform-based courier work through apps like Uber Eats, DoorDash, and Deliveroo [5, 10]. This shift has sparked a significant debate regarding employment status: