Producers whose products are found to be non-compliant will be subject to fines and other severe penalties even to the point of being prohibited from doing business in the EU. Since the RoHS directive applies to "homogenous material" that is to say, materials of uniform composition throughout that cannot be manually broken down into smaller parts, OEM's must maintain a number of documents to verify compliance should their products come under the scrutiny of the governing authorities. A blanket statement may suffice for the consumer but the authorities will require substantiation which can come in many forms. There are two significant ways to show evidence of compliance. The most common and easiest to obtain is a supplier statement of compliance, however this must be provided on the part level and not merely as a generic statement for all materials supplied. In fact many OEM's will require statements for each item on the Bill of Materials (BOM) used to produce the components they purchase. However, if a component is suspect for any reason, OEM's will require analysis from product testing to certify its compliance; the second most common form of documentation. This may be done by the supplier or the OEM if the supplier is not willing. Suppliers who are not willing to provide compliant product or provide test data risk loosing their European market share.