In line with our press standardization we also would like to receive PDF files that are problem-free and easy to work with. We recommend to use the PDF/X-4 file format. This is available in In-Design from CS3 and upwards, and can easily be used by in In-Design menu selecting File > Adobe PDF Presets > PDF/X-4 when making a PDF. Using this export setting will eliminate most of the common problems that happen when using other PDF settings. Many other applications have the preset built in as well.

Choosing the PDF/X-a Preset in InDesign