Please ensure your artwork preparation inorporates the following : 

          ► All fonts are included and/or outlined.

► Artwork includes 3mm bleed and trim

► Artwork size matches specified dimensions.

► All linked files, images, and fonts are placed in separate folders.

► Colour mode in CMYK

► For Full Colour (CMYK) printing, all spots converted to CMYK - ie: there should be no spot colours in the artwork.

► If dielines or creaselines are included in the artwork, ensure these are set with a spot colour (which is not used in your artwork), and have been set to overprint stroke.