W1LINK
WAccel (interbank network)
WAllpoint
WALTO (interbank network)
WATH (interbank network)
WATM Bersama
WAtm⁵
WBancomat (debit card)
WThe Benefit Company
WCash Group
WCashPool
WCirrus (interbank network)
WEFTPOS
WEuropean Payments Initiative
WGirocard
WGroupement des Cartes Bancaires CB
WInterac
WLink (Indonesia)
WMalaysian Electronic Payment System
WMNET (interbank network)
WMoneyPass
WMultibanco
WMulticaixa
WNYCE
WOtto.
WPlus (interbank network)
WPublix
WRia Money Transfer
WSHAZAM (interbank network)
WSUCRE
WUnified Payments Interface
WUnionPay
WYucho
WZolotaya Korona