Trade agreements or FREI declarations should only be issued if your property is qualified for the ESTV. Not all free trade agreements require specific forms. There is a special NAFTA certificate (CBP 434) for qualifying shipments to Canada and Mexico. Many other FTA partners may accept declarative statements containing certain pieces of data, including information on how the product is qualified for free trade technology. However, importers may continue to ask exporters to use a particular format. If the form/format is optional, the information is necessary to allow the importer to benefit from preferential tariff treatment. Always contact your buyer and forward/transiter about the required documentation. Detailed FTA certification requirements for preferential tariff treatment under the free trade agreement are generally included in their «Rules of Origin» (ROO) chapter. There are three ways to find the specific roo chapter for a specific FTA partner, read the «Where to Find Your Rules of Origin» section in the article «FTA Rules of Origin.» Both the creation of trade and the diversion of trade have a decisive impact on the establishment of a free trade agreement. The creation of trade will result in a shift in consumption from a cost producer to a low-cost producer, which will lead to an expansion of trade. On the other hand, trade diversion will mean that trade will move from a low-cost producer outside the zone to a more expensive producer in the free trade agreement.
 Such offshoring will not benefit consumers under the free trade agreement, which will be deprived of the opportunity to purchase cheaper imported goods. However, economists note that trade diversion does not always harm the overall national well-being: it can even improve national well-being as a whole if the volume of misappropriated trade is low.  The trade agreement database provided by the ITC market access map. Given that hundreds of free trade agreements are currently in force and are being negotiated (approximately 800 according to the rules of the intermediary of origin, including non-reciprocal trade agreements), it is important for businesses and policy makers to keep their status in mind. There are a number of free trade agreement custodians available at national, regional or international level. Among the most important are the database on Latin American free trade agreements, established by the Latin American Integration Association (ALADI) , the database managed by the Asian Regional Integration Center (ARIC) with information agreements concluded by Asian countries and the portal on free trade negotiations and agreements of the European Union.  Since WTO members are required to communicate their free trade agreements to the secretariat, this database is based on the official source of information on free trade agreements (called the WTO-language regional trade agreement). The database allows users to obtain information on trade agreements that are communicated to the WTO by country or theme (goods, services or goods and services). This database provides users with an up-to-date list of all existing agreements, but those that are not notified to the WTO may be lacking. In addition, reports, tables and graphs containing statistics on these agreements, including preferential tariff analysis, are presented.
 Not all FREI agreements/declarations require the use of certain alphabetical codes for preferential criteria.