I had made a packing design that was approved but not yet fully paid for.
Client: We are really in a hurry, so please send fonts and colors you’ve used ASAP. And what software do you use to design things? This is urgent!
Me: What do you mean? Do you need print files? Sure, but I need to be paid before I send you the finished files.
Client: Why do we have to pay you? This was our idea of design! I even sent you mock-up in Photoshop!