C/O is required by your Chamber of Commerce or related government body (since your minister of commerce cannot issue this letter).. usually C/O will specify “one” country of origin. However, if your machine/ parts of your machine, such as motors, accessories, are made in different country of origins.. then we need your C/O recommended letter to describe/ explain the origins of those parts. This might not be required if that part of machine does not engrave ‘made in’ on the part itself.