CLS stands for Continuous Linked Settlement. The CLS Bank provides global multi-currency settlement services for foreign exchange transactions, using a payment versus payment (PvP) mechanism (meaning that a foreign exchange operation is settled only if both counterparties simultaneously have a sufficient position in the currency they are selling).
CLS BANK
Meaning of CLS BANK in English
European Central Bank English Glossary. Английский глоссарий Европейского Центрального Банка. 2012