After European concerns with wholesale SWIFT data export were raised, it became necessary for the United States to negotiate a treaty with the EU in order to be able to continue accessing the SWIFT database. The "Agreement between the European Union and the United States of America on the processing and transfer of Financial Messaging Data from the European Union to the United States for the purposes of the Terrorist Finance Tracking Program" was negotiated during 2009. The treaty was first rejected by the European parliament, however after a few months and a visit by U.S. Vice president Joe Biden to the parliament, the European Commission introduced a proposal with strengthened safeguards, which was then adopted.