If you look at the iPhone for example, there is a menu where Apple lists EVERY single last license that applies for any software they ship. Settings > General

If you look at the iPhone for example, there is a menu where Apple lists EVERY single last license that applies for any software they ship. Settings > General > About > Legal > Legal Notices Where necessary reproducing the licenses isn't that difficult, either in documentation or within some part of the program. If your customers are purchasing something from you as an OEM you should notify them that they need to put certain statements in their documentation.