We send Illustrator files to print manufactures overseas and they ask for PMS colors to be called out somewhere within the artboard (a box of color with PMS 376 typed out underneath for example).
I know that's best practice so they can easily identify the PMS colors, but I've found if I forget to include that 'call out' they just pick a random PMS color that's close to what we've used in the artwork even though the PMS swatch is included in the Swatches Panel and you can easily identify what PMS colors are used through Illustrator. Why is this?