Zalando is testing an on-demand collection service for customers in Paris who wish to return their online purchases. The free service allows customers to set up appointments with couriers for a pick up within thirty minutes or at a convenient time during the week, from 9am to 8pm seven days a week. The German e-tailer has begun testing the service in France after a successful run in Cologne, Berlin and Vienna as well as in the Netherlands, where the option has been available to local customers since September.