What is a requirement for PSPs to participate in TIPS?

Participation in TIPS (TARGET Instant Payment Settlement) requires payment service providers (PSPs) to allocate a portion of their liquidity specifically to facilitate TIPS payments. This requirement ensures that PSPs can efficiently settle instant payments in real-time, maintaining the system's integrity and functionality. By dedicating liquidity for this purpose, PSPs support the dynamic nature of instant payment transactions, allowing for immediate availability of funds and enhancing overall payment system reliability.

The other options do not fulfill the specific requirements for TIPS participation. For instance, processing payments solely in GBP or being registered with the European Central Bank (ECB) does not guarantee capability in managing instant payments under TIPS. Additionally, the assertion that payments can be settled without central bank involvement undermines the operational framework of TIPS, which relies on central bank mechanisms to ensure secure and efficient transaction processing.