As Turkey is in a customs union with the EU, it has to adjust its tariffs and duties to match those of the EU. However, the free trade agreements (FTAs) signed by the EU do not extend to Turkey, so the EU's FTA partners can export to Turkey tariff-free, while maintaining tariffs on Turkish goods, unless they also conclude a separate FTA agreement with Turkey. During the negotiation of the Transatlantic Trade and Investment Partnership (TTIP), Turkey raised the prospect of leaving the customs union over the economic contraction it would suffer as American goods would enter Turkey tariff-free and Turkish goods would continue to face American tariffs.