There could be an audit system set up. Companies are very familiar with technological and other types of audits, so that could be one way of doing it, but you have to realize that it's really complicated for a company to go beyond the other company's boundaries. For example, in the case we're talking about, going to the Turkish company and then doing an audit there, a supplier audit or a final client audit would be doable.
However, once the product is in the hands of government agencies, it becomes harder to do that unless you have a service contract or a provision where you give the right to check the material from time to time and do periodic maintenance or activate or deactivate features, depending on what the contract says and the uses that the material is intended for.