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  2. Square (financial services) - Wikipedia

    en.wikipedia.org/wiki/Square_(financial_services)

    Square is a financial services platform by Block, Inc. for small and medium-sized businesses. [1] [2] It enables accepting credit card payments using smartphones as POS registers, and facilitates various business operations. As of 2023, Square reports 4 million merchant clients and an annual payment value of US$ 210 billion.

  3. Block, Inc. - Wikipedia

    en.wikipedia.org/wiki/Block,_Inc.

    Block, Inc. (formerly Square, Inc. [9]) is a U.S. public company founded by Jack Dorsey and Jim McKelvey in 2009. It is a financial technology conglomerate, reportedly serving 56 million users and 4 million businesses, with an annual payment processing volume of US$ 228 billion as of 2023. [10] [11] [3]

  4. Four Corners Model for Payment Security - Wikipedia

    en.wikipedia.org/wiki/Four_Corners_Model_for...

    The Four Corners model, often referred to as the Four Party Scheme is the most used card scheme in card payment systems worldwide. This model was introduced in the 1990s. It is a user-friendly card payment system based on an interbank clearing system and economic model established on multilateral interchange fees (MIF) paid between banks or other payment institutions.

  5. Payment service provider - Wikipedia

    en.wikipedia.org/wiki/Payment_service_provider

    Payment service provider. A payment service provider ( PSP) is a third-party company that allows businesses to accept electronic payments, such as credit card and debit card payments. PSPs act as intermediaries between those who make payments, i.e. consumers, and those who accept them, i.e. retailers. [1]

  6. Global Payments - Wikipedia

    en.wikipedia.org/wiki/Global_Payments

    Global Payments has been an independent, publicly-traded company on the New York Stock Exchange having the ticker symbol “GPN” since its spin off. In 2009, it paid $75 million for United Card Service, Russia's leading credit card processing company. [13] In 2011, Global Payments's United Card Service bought Alfa-Bank 's credit card ...

  7. Payment card interchange fee and merchant discount antitrust ...

    en.wikipedia.org/wiki/Payment_Card_Interchange...

    The payment card interchange fee and merchant discount antitrust litigation is a United States class-action lawsuit filed in 2005 by merchants and trade associations against Visa, Mastercard, and numerous financial institutions that issue payment cards. The suit was filed because of price fixing and other allegedly anti-competitive trade ...

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