To cancel an order placed with EMS.com, customers will typically need to refer to the specific cancellation policy outlined on the website. It is advisable to act quickly, as cancellations may be time-sensitive, depending on the status of the order. Customers often find cancellation instructions in their account section or within the order confirmation email. These instructions could provide guidance on how to initiate the cancellation process and whether there is a specific timeframe for doing so. If the website does not clearly outline the cancellation procedure, the best approach would be to check the contact information available on the current web page for assistance. Ensuring to have order details handy when seeking help can expedite the process.