than 6% following the announcement. Corporate affairs Headquarters In 2009, Visa moved its corporate headquarters back to San Francisco when it leased the top three floors of the 595 Market Street office building, although most of its employees remained at its Foster City campus. In 2012, Visa decided to consolidate its headquarters in Foster City where 3,100 of its 7,700 global workers are employed. Visa owns four buildings at the intersection of Metro Center Boulevard and Vintage Park Drive. As of October 1, 2012, Visa's headquarters are located in Foster City, California. Visa had been headquartered in San Francisco until 1985, when it moved to San Mateo. Around 1993, Visa began consolidating various scattered offices in San Mateo to a location in Foster City. Visa became Foster City's largest employer. In December 2012, Visa Inc. confirmed that it will build a global information technology center off of the US 183 Expressway in northwest Austin, Texas. By 2019, Visa leased space in four buildings near Austin and employed nearly 2,000 people. On November 6, 2019, Visa announced plans to move its headquarters back to San Francisco by 2024 upon completion of a new "13-story, 300,000-square-foot building". Operations Visa offers through its issuing members the following types of cards: Debit cards (pay from a checking/savings account) Credit cards (pay monthly payments with or without interest depending on a customer paying on time) Prepaid cards (pay from a cash account that has no check writing privileges) Visa operates the Plus automated teller machine network and the Interlink EFTPOS point-of-sale network, which facilitate the "debit" protocol used with debit cards and prepaid cards. They also provide commercial payment solutions for small businesses, midsize and large corporations, and governments. Visa teamed with Apple in September 2014, to incorporate a new mobile wallet feature into Apple's new iPhone models, enabling users to more readily use their Visa, and other credit/debit cards. Operating regulations Visa has a set of rules that govern the participation of financial institutions in its payment system. Acquiring banks are responsible for ensuring that their merchants comply with the rules. Rules address how a cardholder must be identified for security, how transactions may be denied by the bank, and how banks may cooperate for fraud prevention, and how to keep that identification and fraud protection standard and non-discriminatory. Other rules govern what creates an enforceable proof of authorization by the cardholder. The rules