Yes, Test Customer.  You go to Shopify Admin, then click on "Customers" and then "Add Customer".   It's not that much work really.  I just had to do that yesterday, took me 1-3 minutes.  Having a "Test Customer" is useful anyway for all sorts of thin...

I use an ugly workaround but it works.  I created a "Test User" (with my email), then "Test Product" with unlimited quantity, then "Test Order". I then create a shipping label from it using the customer's real address (and ensure NOT to use customer'...