Citi and SWIFT Complete Experiment to Sync Fiat and Blockchain Settlements

TLDR

• Citi and SWIFT successfully tested a hybrid model for simultaneous fiat and digital asset transfers.
• The trial upgraded SWIFT’s infrastructure with blockchain components like smart contracts and secure on-chain connectors.
• A coordinated messaging layer ensured both fiat and blockchain transfers settled simultaneously, eliminating settlement risks.
• Citi used USDC tokens on Ethereum’s Sepolia network to simulate real market conditions during the experiment.
• SWIFT and Citi plan to refine their framework with the broader financial sector to improve interoperability and security.

Citi and SWIFT have completed an experiment that demonstrates how fiat money and digital assets can be exchanged simultaneously. The test utilized a Payment-versus-Payment (PvP) model, highlighting the potential for seamless integration between traditional financial systems and blockchain networks. This trial marks a key step in exploring hybrid models that combine existing infrastructure with blockchain technology.

Hybrid Payment System with Blockchain Integration

In the trial, Citi and SWIFT upgraded the SWIFT network by adding blockchain-specific components like smart contracts, orchestration tools, and secure on-chain connectors. The goal was not to create a new network but to allow banks to interact with tokenized assets within their existing systems. The partners aim to develop a model that does not force banks to abandon their current infrastructure but integrates blockchain features.

The system featured a coordinated messaging layer that tracked the entire transaction. A dedicated escrow function ensured that the blockchain transfer would not proceed until the fiat transfer was confirmed, effectively eliminating settlement risks. The automated system guaranteed that both sides of the transaction settled simultaneously, protecting both parties from exposure.

For the test, Citi used USDC tokens on Ethereum’s Sepolia network to simulate real market conditions. This demonstrated how blockchain assets could be synchronized with traditional FX flows without manual intervention. The success of this trial paves the way for future integration between fiat and blockchain systems, targeting the long-standing gap in global finance.

Citi and SWIFT consider the experiment as an early step toward standardizing the framework for digital asset settlements. The partners plan to work with the broader financial sector to improve interoperability and security for large-scale blockchain transfers. SWIFT is focused on refining its infrastructure to support the increasing adoption of digital assets in global financial markets.

Citi’s Expanding Role in Blockchain-Based Financial Infrastructure

Citi’s research division anticipates rapid growth in the digital asset sector, forecasting the stablecoin market could reach $1.9 trillion by 2030. The bank also expects institutional participation to increase, with monthly stablecoin transfers nearing $1 trillion. Although most of the current stablecoin activity is transactional, Citi’s push for institutional adoption suggests broader use cases on the horizon.

Citi’s recent collaborations further illustrate its commitment to digital finance. The bank has partnered with Coinbase to streamline institutional payments and is preparing to roll out digital asset custody services in 2026. These moves position Citi as one of the leading financial institutions embracing blockchain technology in the global financial infrastructure.

The Citi–SWIFT experiment demonstrates the growing alignment between traditional finance and blockchain technology. As both organizations refine their model, their efforts are shaping the future of digital asset settlements.

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