Same day funds
Seal
Sealing
Secret key
Secure Cryptographic Device (SCD)
Security audit
Security Centre
Security management
Sender finality
Settlement
Settlement agent
Settlement bank
Settlement date
Settlement institution
Settlement risk
Settlement system
Settling participant
Signatory
Signature-creation data
Single authentication
Single-purpose prepaid card
SIT bank message
SIT beneficiary bank
SIT collective service
SIT Common Centre
SIT community service
SIT direct participant
SIT exchange period
SIT exchange range
SIT indirect participant
SIT installation
SIT instructing bank
SIT outbound remittance
SIT participant
SIT receiving bank
SIT return remittance
SIT sending bank
SIT user
Smart card
Standing order
Stream cipher
Surcharge fee
Switch fee
Symmetric algorithm
Symmetric cryptography
Systemic disruption
Systemic risk
Systemically important payment system

Settlement bank  

The entity that maintains cash accounts used to settle payment obligations associated with transactions. The settlement bank may be either a commercial bank, the settlement system itself or a central bank.