EZ Online Payment Make a payment on your Statement, Sales Order or Service Order * Customer First & Last Name: * Order ID or Invoice #: Payments will show on your credit card right away, but may take 3-5 business days to process on Zagers’ side. How do I find my Invoice #? If you have a Statement, your Invoice # will be towards the middle of the document, on the first line under the header. How do I find my Order ID? If you have a Sales Order, your Order ID is in the top right-hand corner. How do I find my Order ID? If you have a Service Order, your Order ID is in the bottom left-hand corner.