Wire transfer, bank transfer or credit transfer is a method of electronic funds transfer from one person or entity to another. A wire transfer can be made from one bank account to another bank account or through a transfer of cash at a cash office.
Different wire transfer systems and operators provide a variety of options relative to the immediacy and finality of settlement and the cost, value, and volume of transactions. Central bank wire transfer systems, such as the Federal Reserve's FedWire system in the United States are more likely to be real time gross settlement (RTGS) systems. RTGS systems provide the quickest availability of funds because they provide immediate "real-time" and final "irrevocable" settlement by posting the gross (complete) entry against electronic accounts of the wire transfer system operator. Other systems such as CHIPS provide net settlement on a periodic basis. More immediate settlement systems tend to process higher monetary value time-critical transactions, have higher transaction costs, and a smaller volume of payments. A faster settlement process allows less time for currency fluctuations while money is in transit.
The first widely used service for wire transfers was launched by Western Union in 1872 on its existing telegraph network. Using passwords and code books, a telegraph operator in one office could "wire" money that had been paid to that office by the sending customer to another telegraph office to be paid out to the receiving customer. By 1877 the service was used to transfer almost $2.5 million each year.
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Bank wire transfers are often the cheapest method for transferring funds between bank accounts. A bank wire transfer is effected as follows:
Banks collect payment for the service from the sender as well as from the recipient. The sending bank typically collects a fee separate from the funds being transferred, while the receiving bank and intermediary banks through which the transfer travels deduct fees from the money being transferred so that the recipient receives less than what the sender sent.
Since 2009 the European Union Regulation No 924/2009  controls cross-border payments in the European Union. In the new regulation Article 1 (q.v., Ref.4) states that an IBAN/BIC transfer within Single Euro Payments Area (SEPA) must not cost more than a national transfer, no matter which currency is used. The receiving bank can charge for exchanging to local currency.
Prior to this, in 2002 the European Union relegated the regulation of fees a bank may charge for payments in euro between EU member states down to the domestic level, resulting in very low or no fees for electronic transfers within the Eurozone. In 2005, Iceland, Liechtenstein, and Norway joined the EU regulation on electronic transfers. However, this regulation was superseded by the Single Euro Payments Area (SEPA), consisting of 32 European countries.
In the United States, domestic wire transfers are governed by Federal Regulation J and by Article 4A of the Uniform Commercial Code. US wire transfers can be costly. In 2016, among the 15 largest retail banks, the average fee for an outgoing domestic wire was $25. Incoming domestic wire fees were about evenly split between $0 (free) and $15.
With bank-to-bank wire transfer, each account holder must have a proven identity. Chargebacks are unlikely, although wires can be recalled. Information contained in wires are transmitted securely through encrypted communications methods. The price of bank wire transfers varies greatly, depending on the bank and its location; in some countries, the fee associated with the service can be costly.
Wire transfers done through cash offices are essentially anonymous and are designed for transfer between persons who trust each other. It is unsafe to send money by wire to an unknown person to collect at a cash office; the receiver of the money may, after collecting it, not provide whatever goods or services they promised in return for the payment, but instead simply disappear. This scam has been used often, especially in the so-called 419 scams which often nominate Western Union for collection.
International transfers involving the United States are subject to monitoring by the Office of Foreign Assets Control (OFAC), which monitors information provided in the text of the wire and then decides whether, according to the US Government's federal regulations and political positions, money is being transferred to terrorist groups, or countries or entities under sanction by the United States government. If a financial institution suspects that funds are being sent from or to one of these entities, it must block the transfer and freeze the funds.
SWIFT or IBAN wire transfers are not completely free of vulnerabilities. Every intermediary bank that handles a wire transaction can take a fee directly out of the wire payload (the assets being transferred) without the account holder's knowledge or consent. In many places, there is no legislation or technical means to protect customers from this practice. If bank S is the sending bank (or brokerage), and bank R is the receiving bank (or brokerage), and banks I1, I2 and I3 are intermediary banks, the client may only have a contract with bank S and/or R, but banks I1, I2 and I3 can (and often do) take money from the wire without any direct arrangement with the client. Clients are sometimes taken by surprise when less money arrives at bank R. Contrast this with cheques, where the amount transferred is guaranteed in full, and fees (if there are any) can be charged only at endpoint banks.
The European Union offers some partial protection from this practice by prohibiting European intermediary banks from taking a fee out of the amount being transferred, even for transatlantic transfers. However, it's still common practice for a European brokerage firm to state that they charge no transfer fee, and then contract their bank to take an unpublished fee from the amount transferred as a means to compensate their bank with their clients' assets--e.g., CMC Markets implements this policy in partnership with Natwest.
One of the largest companies that offer wire transfer is Western Union, which allows individuals to transfer or receive money without an account with Western Union or any financial institution. Concern and controversy about Western Union transfers have increased in recent years, because of the increased monitoring of money-laundering transactions, as well as concern about terrorist groups using the service, particularly in the wake of the September 11, 2001 attacks. Although Western Union keeps information about senders and receivers, some transactions can be done essentially anonymously, for the receiver is not always required to show identification.
There are other companies in this market, like ACE Money Transfer, RIA Financial Services, MoneyGram and VFX Financial PLC and LCC Money Transfer (both based in Europe) as well as Azimo, Dwolla, TransferGo, and TransferWise.
Another option for consumers and businesses transferring money internationally is to use specialised brokerage houses for their international money transfer needs. Many of these specialised brokerage houses can transfer money at better exchange rates compared to banks, thus saving up to 4%. These providers can offer a range of currency exchange products like Spot Contracts, Forward Contracts and Limit Orders. However, not all such providers are regulated by appropriate government bodies. For example, in the UK, even though such companies are regulated by the Financial Conduct Authority, not all of them fall under (FCA) scrutiny. Regulators include the Australian Securities and Investments Commission (ASIC), the Financial Transactions Reports Analysis Centre of Canada (FINTRAC) in Canada, the Hong Kong Customs and Excise Department in China and the Financial Conduct Authority (FCA) in the UK. 
Most international transfers are executed through SWIFT, a co-operative society founded in 1974 by seven international banks, which operate a global network to facilitate the transfer of financial messages. Using these messages, banks can exchange data for the transfer of funds between financial institutions. SWIFT's headquarters are in La Hulpe, on the outskirts of Brussels, Belgium. The society also acts as a United Nations-sanctioned international standards body for the creation and maintenance of financial-messaging standards. See SWIFT Standards.
Each financial institution is assigned an ISO 9362 code, also called a Bank Identifier Code (BIC) or SWIFT Code. These codes are generally eight characters long. For example: Deutsche Bank is an international bank with its head office in Frankfurt, Germany, the SWIFT Code for which is DEUTDEFF:
Using an extended code of 11 digits (if the receiving bank has assigned extended codes to branches or to processing areas) allows the payment to be directed to a specific office. For example: DEUTDEFF500 would direct the payment to an office of Deutsche Bank in Bad Homburg. SWIFT deviate slightly from the standard though by using position nine for a Logical Terminal ID, making their extended codes 12 digits long.
European banks making transfers within the European Union and within Switzerland also use the International Bank Account Number, or IBAN.
International prepaid cards are an alternative way for transferring funds. Companies can provide a debit card for worldwide employees' payments. The recipients don't need to have a bank account and can use the card in places that a debit card is accepted at point-of-sale or online and may withdraw funds in local currency at an ATM.
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Other forms of electronic transfers include, for example, electronic funds transfer system (EFTS). This is the system one uses when one gives one's bank account number and routing information to someone owed money and that party transfers the money from one's account. It is also the system used in some payments made via a bank's online bill payment service. EFTS transfers differ from wire transfers in important legal ways. An EFTS payment is essentially an electronic personal check, whereas a wire transfer is more like an electronic cashier's check.
In the United States, such EFTS transfers are often called "ACH transfers," because they take place through the Automated Clearing House.
One important way ACH transfers differ from wire transfer is that the recipient can initiate it. There are of course restrictions, but this is the way people often set up automatic bill payment with utility companies, for example.
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