Signet by Signature Bank: Crypto's Lost Payment Rail, Explained

Before March 2023, if you ran a crypto exchange or a digital asset fund and needed to move dollars over a weekend, you had one word on your lips: Signet. The Signet Signature Bank platform was the closest thing the crypto industry had to a financial utility — always on, instant, and dollar-denominated. Then, in one chaotic weekend, it was gone.

Understanding what Signet was, why it mattered, and what happened to it tells you a lot about the fragile relationship between crypto and traditional banking — and why that relationship still isn't fully repaired in 2026.

This article covers what the Signet platform actually did, who relied on it, why Signature Bank collapsed, and what has (and hasn't) replaced it since.

What Was Signet? Signature Bank's Crypto Payment Network Explained

Signet was a proprietary, blockchain-based digital payments platform operated by Signature Bank that allowed clients to transact in US dollars 24 hours a day, 7 days a week, 365 days a year — including weekends and public holidays.

That sounds basic. It's not. Traditional US bank wires run on Fedwire, which operates roughly 9am–6pm Eastern on business days. If you needed to send dollars on a Saturday — to meet a margin call, fund a trading desk, or pay a counterparty — you were stuck waiting until Monday.

Signet solved that. Clients on the Signet network could send dollar payments to each other in real time, at any hour, on any day. The transfers settled instantly, without correspondent banks, and with no minimum transaction size.

Who Was Using Signet?

Signet's client list read like a who's who of the crypto industry circa 2022:

• Crypto exchanges: Coinbase, Kraken, Gemini, and others held accounts at Signature to enable Signet transfers for their institutional clients
• Crypto hedge funds and trading firms: desks that needed to rebalance dollar positions across counterparties around the clock
• Stablecoin issuers: Circle (USDC) used Signature Bank heavily for the dollar flows underlying USDC minting and redemption
• OTC desks and market makers: firms executing large crypto trades where settlement speed was critical

At its peak, Signet was handling billions in dollar transfers every month. For institutional crypto participants, it wasn't a nice-to-have — it was infrastructure.

Pro Tip: To understand why Signet mattered so much, picture running a 24/7 crypto exchange where users expect instant USD withdrawals. Without Signet (or something like it), every weekend withdrawal request stacks up until Monday morning — creating a liquidity crunch that could look like insolvency even when it wasn't.

What Happened to Signature Bank and the Signet Platform?

On March 12, 2023 — the same weekend that Silicon Valley Bank collapsed — New York state regulators shut down Signature Bank and placed it into FDIC receivership. It was the third-largest bank failure in US history.

The Causes of Signature Bank's Collapse

Signature Bank's collapse was different from SVB's. SVB failed primarily due to interest rate risk on its bond portfolio. Signature's story is more complicated — and more politically charged.

The contributing factors:

• Crypto exposure: Signature had aggressively courted crypto clients from 2018 onward. By 2022, roughly 30% of its deposits were crypto-related. When the FTX collapse in November 2022 triggered a crisis of confidence in crypto institutions, Signature saw significant deposit outflows.

• Contagion fear: When SVB failed on Friday March 10, depositors across banks with concentrated client bases panicked. Signature faced a bank run as depositors tried to pull funds.

• Regulatory pressure: This is where it gets contested. Former Signature board member and ex-FDIC chair Barney Frank publicly stated he believed Signature was closed in part to send a message to the crypto industry — a claim regulators denied. The FDIC cited "crisis of confidence" in management.

• The numbers: Signature had $110 billion in assets at closure. The FDIC guaranteed all deposits — including those above the $250,000 insurance limit — to prevent further contagion.

According to FDIC's official statement on the Signature Bank closure, the decision was made to protect depositors and the broader financial system.

What Happened to the Signet Platform After Closure?

Here's the part most crypto participants wanted answered in March 2023: does Signet survive?

Short answer: technically yes, functionally different.

Flagstar Bank (which acquired most of Signature's non-crypto assets) purchased the Signet platform along with the broader Signature deposit book. Flagstar — now part of New York Community Bancorp (NYCB) — kept the Signet brand and technology running, but significantly reduced its crypto client base.

The Flagstar Signet that emerged from the FDIC sale is a more conservative version of the original. It still offers real-time dollar transfers, but many crypto-native firms found Flagstar less willing to onboard new clients in the crypto space following the controversy around Signature's closure.

What Replaced Signet for Crypto Firms?

The industry scrambled to find alternatives. Several emerged:

CBIT (Customers Bancorp's real-time payment network) became the most direct replacement for many crypto firms. Like Signet, it offers 24/7 dollar transfers between clients on the network — and Customers Bancorp has been notably more willing to serve crypto clients than Flagstar.

FedNow — the Federal Reserve's instant payment infrastructure launched in July 2023 — operates 24/7 but requires participating banks to offer it to their clients. Not all banks have integrated FedNow, and it doesn't replicate Signet's closed-network efficiency for crypto-specific flows.

Why the Signet Signature Bank Story Still Matters in 2026

Three years on, the collapse of Signature Bank and the Signet platform still echoes through the crypto banking landscape. Here's why it's still relevant.

Crypto Still Lacks Full Banking Infrastructure

The Signature Bank closure — alongside Silvergate's voluntary liquidation the same week — removed two of the three most crypto-friendly US banks in a single weekend. The third, Silicon Valley Bank, also failed. That's a near-complete wipeout of purpose-built crypto banking infrastructure in seven days.

In 2026, the gap hasn't fully closed. Crypto firms still face more friction accessing basic banking services than almost any other industry. Large banks remain cautious about crypto deposit concentrations after watching what happened to Signature. And while CBIT and other alternatives exist, none has achieved the network density that Signet had at its peak.

The Regulatory Message Was Received

Whether or not regulators intentionally targeted crypto when closing Signature Bank — a debate that continues in 2026 — the industry heard a message: concentrated banking relationships with crypto-friendly institutions are a single point of failure. That's changed how sophisticated crypto firms think about banking relationships, pushing many toward diversifying across multiple banking partners rather than relying on one Signet-style rail.

The 2023 Banking Crisis Reshaped Crypto's Risk Thinking

The USDC depeg scare during the SVB weekend — when Circle disclosed $3.3 billion in USDC reserves held at SVB — showed that stablecoin stability could be threatened by traditional bank failures. That's accelerated interest in alternative reserve structures, on-chain settlement, and reducing dependence on any single banking relationship.

Quick Tip: If you're a crypto business evaluating banking relationships, look for banks that participate in both FedNow and have established crypto compliance frameworks. No single bank should control your entire USD settlement capacity — the Signature Bank lesson applies directly.

FAQ

What was Signet by Signature Bank?

Signet was Signature Bank's proprietary real-time payments network that allowed crypto and fintech clients to transfer US dollars 24/7, including weekends and holidays. It was widely used by crypto exchanges, trading firms, and stablecoin issuers who needed to move dollar liquidity outside of normal banking hours.

Why did Signature Bank collapse in 2023?

Signature Bank collapsed in March 2023 following a bank run driven by contagion from Silicon Valley Bank's failure and broader fears around crypto-exposed institutions. The bank had significant crypto deposit concentration (~30% of deposits were crypto-related), which made it vulnerable when confidence in the crypto sector deteriorated after the FTX collapse in late 2022.

Does Signet still exist after Signature Bank's closure?

Yes, in a limited form. Flagstar Bank acquired the Signet platform from the FDIC after Signature's closure. The platform continues operating, but Flagstar has significantly reduced its crypto client base compared to the original Signature Bank. Many former Signet users have migrated to Customers Bancorp's CBIT platform.

What replaced Signet for crypto firms?

The main alternatives are Customers Bancorp's CBIT (the most direct functional replacement), FedNow (the Federal Reserve's 24/7 payment infrastructure launched July 2023), and various international banking alternatives. No single replacement has achieved the network density that Signet had at its peak.

Was Signature Bank's closure connected to crypto regulation?

This remains contested. Former Signature board member Barney Frank publicly claimed the closure was partly politically motivated to send a message to the crypto industry. Regulators denied this, citing a crisis of confidence in management and depositor panic following SVB's collapse. Congressional hearings examined the closure but reached no definitive conclusions on the regulatory intent question.

The Signet Signature Bank story is more than a banking post-mortem. It's a case study in what happens when an industry builds critical infrastructure on top of institutions that regulators can shut down overnight. The 24/7 dollar payment rail that Signet provided was genuinely valuable — and losing it in a single weekend exposed just how thin the banking infrastructure beneath crypto actually was.

Understanding what Signet was, what replaced it, and what's still missing helps you think more clearly about the risks in any crypto business that depends on dollar settlement. The lesson hasn't expired: banking relationships are a single point of failure until they're not.